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the tree's Profile User Rating: -----

the tree's Photo
Reputation: 220 Beacon of Hope
Group:
Senior Members
Active Posts:
2,632 (1.03 per day)
Most Active In:
Mathematics (562 posts)
Joined:
31-May 05
Profile Views:
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Last Active:
User is offline May 19, 2012
Currently:
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My Information

Member Title:
Primate
Age:
23 years old
Birthday:
January 3, 1989
Gender:
Not Telling Not Telling
Interests:
Little bit of everything
Favorite Area of Science:
Maths

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E-mail:
Click here to e-mail me
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Posts I've Made

  1. In Topic: Confusion on the given tutorial.

    7 May 2012 - 03:43 PM

    Taking the limit as h -> 0 is different to just substituting in h=0.

    You'll need a better idea of limits before trying to work your way through that proof.

  2. In Topic: Confusion on the given tutorial.

    29 April 2012 - 01:47 PM

    You just made a tiny mistake, you should be looking at:

    \lim_{h \to 0} \frac{(x+h)^2 - x^2}{h}

    you'll find it works out easily.

  3. In Topic: doubling a number over and over

    23 April 2012 - 06:20 PM

    View Postrogerxd45, on 23 April 2012 - 05:42 PM, said:

    ok so i want to know if there is an easier way to figure out how many times you would have to double a number before getting to certain number. (other then going 2x2x2x2x2x2x2

    question two lets say we take the number 1080 is there a way to figure out how many times it had been doubled assuming the start point is 1
    That would be what logarithms are for. If y=2x then log2(y)=x.

    In the case of your example, log2(1080)=10.077...

    So we know that it's not 1 doubled a whole number of times. The best we can say at that point is 210<1080<211.

    A little further investigation will tell you that 1080=210+56.

    If your calculator cannot do base 2 logarithms then you'll have to use the natural logarithm ( ln or loge ) and to do that you'll need to know that logb(x)=ln(x)/ln(b).

    View Postrogerxd45, on 23 April 2012 - 05:42 PM, said:

    what if the starting number was 4 any way to figure that out besides the long way
    Well I think since 4=22 you might be able to work that out.

  4. In Topic: Why we need mandatory global birth-control

    30 March 2012 - 08:51 PM

    View Postecoli, on 30 March 2012 - 04:47 PM, said:

    Having offspring is the evolutionary equivalent of living forever.

    View PostGreen Xenon, on 30 March 2012 - 04:54 PM, said:

    Why not override evolution and eliminate the stress of offspring while continuing to live your own life for as long as science allows?
    Because evolution's solution is a lot better than anything we've ever come up with. The problem is that things will always fall apart eventually, entropy increases, nothing should last forever and that's sort of built into the universe. We can patch things up or whatever. But things that make new things, with adaptation to a varying environment, we haven't found a better solution.

  5. In Topic: What is a number divided by 0?

    16 March 2012 - 09:21 PM

    View Postdr. undefined, on 15 March 2012 - 08:21 PM, said:

    How do you conclude about the value 'i'?

    View Postmorgsboi, on 15 March 2012 - 11:50 PM, said:

    Because it is a value that doesn't exist.
    That isn't how it works in the slightest.

    View PostDekan, on 16 March 2012 - 07:22 PM, said:

    2. the belief that the symbol "0" is a number - when it isn't . It's the absence of a number. Recall that the symbol was invented as a place-marker[...]And so mathematicians try to treat it as a number, when it isn't. And that's why the mathematicians get confused, and see problems and paradoxes, when really there aren't any.
    • 0 is a number.
      • It doesn't fall under the range of the domain of the division function.
      • But it's still a number.
    • You're correct in that there are no problems or paradoxes.
    • I really doubt any mathematicians are confused by this.

Comments

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  1. Photo

    DJBruce 

    09 Aug 2009 - 13:56
    The game he is talking about is Warship Gunner 2. [URL="http://ragnarokproject.webs.com/"]http://ragnarokproject.webs.com/[/URL]
  2. Photo

    jsaldea12 

    29 Jun 2009 - 13:45
    Hi! have survived more than three scores, weak body but still getting stronger in knowledge and wisdom in physics. joe aldea
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