# Lightmeow

Senior Members

230

## Posts posted by Lightmeow

### How to find the exact answer of 3^5000 by hand

I am still working on this, but I am not going to try to do this all in one night. Finding 3^256 is ridiculous(can't imagine 3^5000). With the weekend coming up I will have time to work on this. I am trying to find other more efficient ways to do it, but as of now, doing out the problem in the traditional was has seemed to be the "Quickest" (Although I will say this process is anything but quick)

### How to find the exact answer of 3^5000 by hand

Would it be cheating to write a computer programme to do it for you?

Yah, it would be. I have to do it all out by hand.

### How to find the exact answer of 3^5000 by hand

Impressive! Keep going!

Are you really good at this sort of thing in general? Do you have strong mental calculation skills and concentration?

Hmm... Seems little point to continue on, but I will, because why not.

Any one could do this if they tried, although I am pretty good at mental calculation and concentration.

### How to find the exact answer of 3^5000 by hand

Just finished 3^128...

Moving on to 3^256.

This is honestly the most retarded thing I've ever done.

### How to find the exact answer of 3^5000 by hand

LOL I think there isn't enough paper on Earth to write that number. It is approximately 4x102385, which is a lot of digits.

Actually, this is the number:

4038997629787155339700863409815084778394498166775976374862318662815021844263163724409589991283112221957087037127264409252982112748591787717033830403441930283161011881290431641966980623569028664868962702914864744551077531848115736772683548758847258321094808160079292956552763171104067984120533836065664635950242364928442451805995078317248461140444139995818842326862989533584638540917303432618956468436267462217689897536939221538008683721591946120333532143917872449136148108372559491267886787639350432567049929505139561975168349141248659914132248759237997505419159471214523173970710571263045668863231323715937900821485506870729657531757026555737371294825429353175800946829026948092511256737220542210787053051595802981233109856012113525552509973235479897937695548807826632854936270847693205577465760839058922819952696676524973128629373786196564822754641929042959146243903855562489356161956878595415082692189276329429991504770124701085279239460876288448740109138574892062762521143251789856063997453896592241444435083741307994418053089747011639244992143617911287606647084965258198883225653388806207929500332230594182854932910480899682575200047468631366224756184671205687777355791309481664752205737723827605017299803707184630307441302672768508598302249090453749312846375484742763396446462760789222817645292649569226868978755368552822174910148014846327742218968086229060583051969616187683845992803504299049605854491308472202616225188587696208053086463207413261782612698498484353406811946592391520876834837681364361483077335648507177704989176676017490814214154945785456307067444808828699697448178044358744486150076115286258469486513402087248384068655658114518474837867145754599634609879861608173455937726377253437847223098072299681760066838942906126088647741119141414552489886289568286295961338739388592134458987217604566798319860335993725331565539619297067041635560635329536488930786913392026253692233350241045325999643532468824953294370688166093949278863664041795436910656750167596038501554362222214884786870393545144578906190448059134680891645361639347000232719153886678836525568811533800230929254497238314075866436365607455976085809437067430000427425918303638570263277678578732590453700918386680277827005016588188884730521045514996708836288180634799955911110684992623893342705163686819347170019922026233208577169337941687350526454980398188591375023783468711359732633600493563136998276100001

It is exactly 2386 digits. This is a doable question. It will just take me a while

I will post a picture of the work once I finish it. Currently calculating 3^64 out by hand.

Now calculating 3^128

### How to find the exact answer of 3^5000 by hand

That doesn't sound reasonable. I can think of two possibilities here:

1) You annoyed the teacher and (s)he is giving you something that will keep you busy a long time; or

2) You are supposed to find the remainder mod something. For example mod 4, every power of 3 is either 1 or 3 and you can easily figure out which ones are which.

What do you think? Anything to my theory? Otherwise, get a box of pencils and a stack of paper. Or perhaps are you supposed to just estimate its order of magnitude? That would be another more reasonable request.

No, she just wants me to figure it out to keep me busy. At least I am exempt from homework for the time being... I will probably have it done tonight, it will just be a really tedious thing for me to do.

### How to find the exact answer of 3^5000 by hand

Title says it all. I've been challenged by my teacher to do this. I am currently doing it out by hand, it it is extremely tedious and annoying. Are there other more efficient ways to do this?

(P.S. I know I can put it into wolfram, I do have the answer. I just need to figure it out by hand)

### Apple rejects order to unlock gunman's phone

One obvious question is do Apple and the FBI know that a 'back door' is even possible without loss of data?

That aside, I really do not know what to think about this. On one hand a 'back door' could be a great asset in fighting crime and terrorism. On the other hand, personal private information should remain private. The question is what do we think is more important?

Right now I am siding with creation of such a 'back door', but with its use only sanctioned by judges. But how long would it take for such a system to get abused? Or indeed as swansont suggests, fall into private hands for who knows what purpose?

It isn't even a matter of it falling into the wrong hands. Someone could stumble upon the backdoor by chance.

Honestly, I am going to take the stance that the back door shouldn't be used. In the case of the shooter, why do they need to get into his phone? They already know he committed the crime. So what help is having access to his phone going to have?

### Finding the inverse of y = x^7 + x^5

It's just that if some horizontal line intersects the graph at more than one point, then the function can't be invertible; simply because there are two x-values that produce a single y.

I understand what you mean, that the inverse won't be a function. My question was, how would you solve y = x7 + x5 for x. I used the word inverse improperly, as this function does not have an inverse(unless you were to restrict the domain). But it should still have a relation that, when graphed, is a reflection of the function y = x7 + x5 over the line y = x. Just like the graph x2=y has the graph y2=x.

### Finding the inverse of y = x^7 + x^5

I can "brute force"it by simply swapping the axes. So, there is an inverse; there might not be an analytic one.

Is there a way to prove that it is unsolvable by normal means? Why isn't it solvable from an analytic approach?

I think it's likely impossible to do so using radicals (i.e. using only addition, multiplication, and taking nth roots); you'd be solving x^7 + x^5 - a = 0. I'd guess that the Galois group is probably some large subgroup of S7, and so likely isn't solvable.

Thanks for saying that. I am trying to figure out what the Galois group is and S7 is. Could you shed some light or links, because Google isn't telling me that much(Or I am using wrong terms, which seems more likely)

### Finding the inverse of y = x^7 + x^5

y = x7+x5

x = y7+y5

Then you can isolate y on the left hand side if you want.

I am aware of that. You would factor x = y5(y2+1)

But then how would you get y by itself?

### Finding the inverse of y = x^7 + x^5

Hey all. I am trying to figure something out that I can't. Basically, for some reason I wanted to find the inverse of y = x7+x5. How the heck would you do that. I know it is probably possible, but how?

### Anyone here using Windows 10?

I'm probably a bit late in replying to this topic but here it is anyway:

Everyone should upgrade to Windows 10.

I have wanted the world to head in the direction that Microsoft is now coming to realise is a better way to have everyone move forward...

Windows 10 is a terrible OS. It is a nice bloat box, running at idle using about 1.5 GiB of ram. Thats inexcusable. Just because system hardware is getting better, doesn't mean you can get lazy with your programming. I also don't like the idea of all the privacy violations that Microsoft enjoys having. Windows 10 has a built in keylogger for you people that don't know. Its supposedly to help with their spell checking, but considering that Windows 10 is a NSA box, I wouldn't believe that in the entirety.

Having everyone that uses Windows on the exact same version, the same updates etc. will better allow for developers to produce better quality content and without having to constantly check for compatibility issues with their software before releasing it to the Windows Store - Which is where Microsoft is really doing all the hard work, making it more enticing for developers to make Windows Apps which can be used on a variety of devices.

Hmm... Everything should be backwards compatible. If you are actually a good programmer, this shouldn't be a problem. The Windows Store is retarded, just another sales pitch so Microsoft can get their greedy hands on more money then they already have.

Eventually Microsoft will be putting Windows 10 on a subscription based model, similar to that of their Office 365. This is a smart move on their behalf, and also helps out smaller businesses & home users alike.

Instead of spending 1 lump sum of money to buy windows, users will pay a much smaller ongoing monthly fee to use Windows.

This has the following advantages: For businesses, they can claim it as an operating expense and reduce the amount of tax they pay, it also helps to plan/budget outgoing costs.

For home users or students, the same can apply depending on what you use Windows for, again the lower monthly cost is more attractive & affordable by the larger population.

For Microsoft the advantage is clear, their revenue stream will be consistent, it will generate a more even and predictable cash flow.

Putting the Windows operating system on a subscription based model is another nice way to screw over the users and milk them for more money. When I buy something, I just want to buy it once. I guess it is a smaller fee in the short run, but having a monthly fee, will make it so in the long run the users are spending A LOT more money then they would have if they just spent the money once.

Another smart move by Microsoft is allowing a certain amount of the public to become part of their testing team, to use millions of technical minded users & their systems as a testing bed for the latest updates or patches before it gets released to the general public. This allows us to provide feedback in relation to every aspect of Windows, not only do they find "bugs" faster with many minds looking into each new update, but they also allow us to offer suggestion to improve on any part of the system.

With everyone in the world that uses Windows being on the exact same version with forced updates to ensure that everyone is using the latest updates etc. Microsoft can concentrate their support and development efforts on just that Operating System, which will also be extremely attractive to anyone who wants to make Games or Apps for Windows, knowing that what they develop will be useable on everyone's system & will also be offered to a much wider audience than was previously possible, allowing the Game or App maker to generate more interest & income, it also takes some of the testing and cross-platform coding requirements off the developer, which saves them time & money.

Hmm... Back in the day you payed people to bug test your software. These days, just throw out an unfinished product, and make people use it. What you don't understand, is there are a lot more security vulnerabilities doing it the way you do. Throwing "patches" over a problem doesn't really fix it; you should have done it right the first time.

Oh, yah, and forced updates. Yep, I guess big brother Microsoft knows whats best. Lets just fill up my hard drive with a bunch of patches and crap. And when Windows gets super unstable because of how hacked up it is in the future, it won't matter. Microsoft knows best.

Windows 10 will also be "The final Operating System" - It will forever be dynamically changing, slowly morphing & improving over time into a newer Operating System that many years from now might not be too similar to the initial release of Windows 10.

With everyone paying a monthly fee, there is no need to worry about upgrading or "forking out" a bunch of money to have the latest thing, everyone will get it at the same time (after being tested by a world-wide team consisting of about a million people on all kinds of different hardware to ensure the quality/stability of the latest updates).

Lol, it won't be the finial OS.... Lets just say that.

Oh, and I will be forking out a bunch of money to keep up to date. Did you forget I'm paying a monthly fee?(That you will raise every year due to excuses of inflation, etc)

I have personally tested Windows XP, Windows 7, Windows 8.1, Windows 10, many different variants of Linux, all at the same time (multi-boot) on the same systems to do a stability and performance (including start up & shutdown times) comparison.

Windows 10 is indeed faster than the rest at shutting down & starting up even on much older systems, we are still working on improving the performance aspects of many applications within Windows 10, it will only get better as time goes on.

The new Edge browser is also approx. 33% faster than chrome and even faster than that when compared to Firefox or Internet Explorer... However it still has some random web site and some flash & javascript coding issues which will make the browser hang or go super slow, with the next update it shall be better, still not perfect, but better than it is now for everyone using Windows 10 already.

Hmm... One thing you forgot about. As much as I hate Apple, their desktop OS it 100x better than Windows. Oh, and different versions of Linux? Lol. If you are using Ubuntu with bloated Unity, sure, it will be faster. My arch install boots in six seconds(including kernel loading time) and only used 100MiB of ram, and it looks pretty damn nice. And shuts down in about 3 seconds. But honestly, whats the big deal about loading time anyways. I only turn my computer on once a day and leave it on all day, so I really couldn't give a shit if it takes a minute to boot anyways.

Oh, and Edge... I don't think Edge is going to steal the market share and take over like your IE did back in the days of Netscape. Nice try. Edge can't run on anything but windows, so I don't think I'm going to be using it.

Don't worry, I don't think I'm going to be touching Windows 10 anytime soon. I only used Windows 7 for gaming, but all of my games I play have been ported to Linux, so I don't even use Windows anymore. Actually, the last time I touched Windows on a home computer was back in august but, then terraria got ported to linux, and I have never looked back...

Good luck though! That's just personally what I think, but that doesn't mean I'm right. Use what works for you.

Hmm. I agree that the movie was Meh. Honestly, I feel that they were trying to make it for the younger audience(who would buy the Star Wars toys). The plot wasn't complicated at all, and it seemed that it was lighter overall...(I mean compared to the evil in the Revenge of the Sith).

Ren, compared to Anakin, is like comparing a psychopath to a little child who is mad at their parents because didn't get what they wanted. You can't even compare them.

I kind of expected more... We'll see what the later movies are like.

### what's a good programming language to learn?

Javascript is really hard to learn and rather poorly documented. I cannot say that I know all of it because I don't far from it in fact. I still can't make this http://hexgl.bkcore.com/play/

What Strange said. Javascript is really not that much harder to learn than any other language. Perhaps you are referring to poorly documented libraries?

### Cool Arduino Projects?

If you didn't do much stabilization in your past projects, I would suggest you to try to stabilize some inherently unstable process (maglev, segway...).

When I am doing something for fun and when I feel that it might be too easy, then I limit myself to lowest possible budget or only to components that can be found everywhere.

BTW, are you more hardware-interested or software-interested person?

I am a more hardware-interested person, but of course I also can program, because you need to program the hardware.

You could make your own inFORM-like project. With a few motors or actuators and weight sensors, it sort of resembles the swarm-of-nanoparticles sci-fi trope. You could use the Google Maps elevation API to get terrain data for different places and push blocks to represent it accordingly, visualize mathematical functions, or interact with it like some kind of expensive restricted putty. I'm sure you'd think of lots of ideas to implement on it once it's build.

This is amazing. I have never seen anything like that before. This is something I am going to look into... Wow, thanks!

I'm part way into something now; in response to a co-worker (A) having trouble getting the attention of another co-worker (B) when she's got her headphones in.

With an Arduino Nano, an ENC28j60 based Ethernet adaptor and a small servo; the plan is to bolt something to the back of B's monitor (on the Vesa mounts) that allows A to go to a web site and click a link.

That link'll just refer back to itself, with a GET parameter that tells the Arduino to drive the servo to raise a little red flag from behind her screen. If I can do it all secretly, I'm hoping for a good fall-off-her-chair moment.

... haven't done Ethernet on an Arduino before - so that's what I'm having to google and youtube the last few nights. (And is kind of the underlying point of the exercise.)

That seems like another cool thing to do.

Oh, and I don't know if I took what you said out of context, but when i said that I didn't want to Google, I meant I didn't want some really common project that could be found on Google, where I was going to follow some tutorial(like how to make a clock or the like) I can research, I just want something uncommon that would be unique.

### Cool Arduino Projects?

Hi all, I have an opportunity to get some new Arduino stuff for Christmas this year. I haven't choose what I want yet.

I am not asking for like some links on how to do stuff from the internet. I know how to Google, and have done some research. Nothing has really interested me. I was wondering if anyone had any unique ideas that wouldn't cost a large amount of money.

I have done a lot of AI with Arduino, such as turning one of my RC cars into a UAV rover thing, and making a quadrocopter drone. For the project, I was thinking something not in that direction, as I would like to learn something new(Not saying that I know everything about that!)

Any suggestions would be good, it doesn't matter if it is a complex project, or a dumb little project. I'm just trying to brainstorm.

### altering list slices in python 2.7

havent used python for years, but whats the hash for? its usually used a declaration for pre-compilation.

Yeh get matlab student edition is £50 or something? very cheap

i dont know if the # is for a func declaration but it usually has like func return name(data)

The hash in python is pythons comment, it has nothing to do with the preprocessor.

### Every day, 20 US Children Hospitalized w/Gun Injury (6% Die)

Sorry for jumping in. Something I would like to ask iNow is how he will regulate the criminals that will somehow find a way to obtain weapons illegally. Most of the school shootings I have read about have been done by someone who has obtained a weapon without going through the proper chanels.(Be it a kid stealing the gun from his father or whatever) So how is even more regulation the people that follow the law going to help? It's not the people that buy weapons and register them(in most cases) that kill the kids...

This is the one reason why I do not agree with more gun control. It is a good idea in theory, but I do not think it will help at all. The people that follow the law do not need more regulation, its the people that don't follow the law that do, but how are you going to effect people that don't follow the law anyways, by making more laws.

I feel this is like someone stealing something and not getting caught. The company trys to get their money back on the stolen product by raiseing their prices. This effects the people that legally buy the product, but not the people who steal it. Someone steals again, and the prices go up. The cycle goes on. I hope that makes sense. Thats how I see it anyways...

### Linux

I am currently running windows 7 on my pc. However a lot of employers are looking for knowledge of the Linux command line. Considering buying a second pc is out of the question I was told it might be possible to partition my hard drive and install Linux on the partition. But I am scared of doing it because if it didn't work properly I would lose my copy of windows 7 and any files I have. Does anybody know how to do this?

Sorry for bumping this thread, it seems the OP has accomplished what he needed to do, but for future reference to others, if you install one of the major distros(Ubuntu, Mint, OpenSuse, ect) through the gui installer, it will partion the hard drive, and give you an option to install GRUB. GRUB will make it so you can dual boot the computer, and when you reboot after an install you should get the option to use both OS's. If it doesn't, its easy enough to edit the boot record. You probably would rather do this then run it on the VM.

If it's Ubuntu, it will ask you during installation, but I would back up your files to be safe.

Or run Lubuntu on any old piece of junk you can find at a garage sale. https://wiki.ubuntu.com/Lubuntu

All linux distributions use mostly the same command line utilities. I recommend starting with Ubuntu. Just remember that the GUIs are just frontends, and you can often do more with the command line utilities. So don't be lazy! Don't learn GParted, learn fdisk. Don't use GUFW, but learn ufw and eventually iptables. Don't use Software Center, but learn apt-get. The deeper you dig, the more similar the different Linux distributions are to eachother.

Most importantly, read the info and man pages! Just type

info/man name-of-utility

ubuntu.com is an invaluable resource.

You don't compile the source code But seriously it is important to learn the terminal. Here are some useful commands to play with:

xkill - (useful if you are programming, if you have a problem(screwed up a pointer or
something dumb)  Just type that and you should just click on the
window and it kills it.(I use this one ALOT!)
nano - a council based text editor
pwd - print working directory
ls  - list directory
cd - change directory
cp  - copy this file to that file
chmod  - basically changes file permissions(I use this ALOT)
mkdir - make directory
whoami - print whos logged on


If you want help on how to use the commands, type command -h

Sometimes its useful to log into the terminal as a different user.  To do this:
type: su - [user]

Also, if you type in the command man, that loads the Ubuntu manual in the council. Oh, and there is a lot of dumb programs in linux. Type this in the steam locomotive.

sudo apt-get install sl

Then type in sl. So instead of getting an error message when you mistype ls, you get a nice train.

Theres so much more to linux, but those are useful things that I use a bunch. Oh, and if I was you, I'd use just the CLI with linux, but if you really need a gui change the desktop enviroment, because Unity is really processer intensive(And thats bad when you use a VM). You can use LXDE,(thats what Lubuntu uses as the DE) but LXDE is really feature lacking, so another good choice is xfce, or openbox.

### Programming the Human Brain

I wasn't referring to the matrix, I have never watched that movie before. Looks cool though.

How the memory works is fascinating. But I didn't know that how we understood the brain was not how we understand other things. I just see scientists refering to the human brain like a really complex computer. Maybe if we looked at the brain like a computer we would understand it better.

### Function Inverse Help

FYI this isn't homework help, this is me teaching myself.

I have a problem where the book tells me to solve for the inverse of the function. Then the book tells me to evaluate the inverse for:

$h^{-1}(9)$

and...

$h(9)^{-1}$

I can easily do the first one, but what the heck does the second equation mean??? And how do you do it, or is it the same thing just written differently? I've never seen that before!

### a fascinating idea

Ask the person these questions. If atoms were space ships flying around, then:

1. Why can't I fly?

2. Why can't they see the space ships on electron microscopes?(But they can see atoms)

3. How the heck do I stay together? Shouldn't I be a cloud of little space ships zooming around?(And possibly crashing into each other?)

4. What makes up the little spaceships? Or are you saying little space ships are the fundamental building blocks of ALL matter in the universe.

I could think of more but frankly I don't have the time to entertain this idea anymore than I have...

### Why I reject karma and reincarnation, as illogical and nonsensical

So why the heck can't we discuss religion, religion is faith based and something that scientist can prove or disprove.

I would like to clarify this quote, because it could be taken two ways. Alan, are you saying that faith is something that can be proved or disproved? I think know faith is something that cannot be proven, thus the word faith. Also scientists cannot prove or disprove faith, because if we could, then religion would rule our life, or it would have been wiped off the face of the earth a long time ago.

Why are you so worried about you "REP POINTS" I have nothing against you or your rather odd logic and would be sad and sorry to see you exit debate!

Odd logic... I guess odd is in the eye of the beholder, for I find your logic strange myself.

This being a religious subforum in my opinion does not lead to philosophical debates, which are never-ending and get absolutely nowhere.

Don't philosophy and religion go hand and hand? I think the debate of "The Almighty God" existing is a very philosophical debate.

As for me I repeat!! Reincarnation and rebirth after countless rebirths, is an unpleasant idea, to which I refuse to prescribe. When we die, we leave this mortal body that decays due to entropy and go on to exist forever in ethereal planes, some lower than our earthly one and some higher.

As for me, I think the thought of going to another place forever after this short life would be pretty boring, don't you think? There is much more to this Earth that I would like to see. And just the thought of being stuck in a place after I die forever is really scary for me... I feel I would get bored as hell after a few billion years.

Lightmeow,

Such logical deductions as PeterJ makes, such as all positive metaphysical claims are false or absurb, are merely self fulfilling circular arguments, constructed from premises already suspect, because the human senses and judgement are already concluded to be suspect, and incapable of correct judgment of the situation.

Isn't it nice that all of our arguments conveniently self fulfilling?

Sorry, Tar, but I don't intend to spend time explaining anything. It would be a waste of my time when all the information is readily available. Not readily comprehensible, maybe, but I can't help much with that. All I'm trying to do is convince you that you don't know enough about the topic to have a reliable opinion, so are in danger of making mistakes.

Then why are you here? If you want to help him gain perspective, you need to help him comprehend it. What would be the point of having this science forum if no one wanted to help each other comprehend the info? What would happen if I asked a math question, and the people here said, here read this, and if you don't understand what you read, then, thats your problem. I find your above statement fairly ludicrous. Please help him out instead of telling him he is ignorant.(And may I note, conveniently playing off of his ignorance)

Lets all be friends and get back on track, will you people? This is a great thread, and I would hate to see it closed!

And also Alan, even though I totally disagree with you, you do have some really great points! :-)

### Programming the Human Brain

I have a pretty crazy idea, that probably won't work, but it's still worth thinking about. So you know with how we have to go to school, and learn. How cool would it be if we could "upload" information into our brain. I don't know how we would do that.

So I have a few questions.

When we learn something, are the things we learn put into our memories(like what we ate yesterday), or does what we learn go into a different part of the brain?

And what are memories anyways? How does the brain store memories? And are what we learn memories?

How are things like learning karate or gymnastics stored in our brain? Is that stored in our memories, or is that a whole separate part of the brain. I am asking that specific question because learning that stuff takes experience to do, and you need to do it over and over. You know, you just don't just read about how to do a back flip, and then be able to do a back flip.

And can modern medical science read memories? And if not, what would need to happen so we could do that?