
Posts
39 
Joined

Last visited
Content Type
Profiles
Forums
Calendar
Posts posted by K947G


No, it's not a novel. He talks a lot about findings from the Human Genome Project. I suppose as far as books are concerned it's comparable to much of Dawkin's works. Informational, but with a more laidback approach.
0 
Has anyone here read it? What did you think of it?
0 
I got 4.3
0 
This is one optimization problem that I just cant figure out. I'll post what I have...
A hiker at point A on a straight road wants to reach, in the shortest time, a point B located 6 miles from the road and 10 miles from point A. The hiker's speed on the paved road is 4 mph and only 2 mph off the road. How far should he continue on the road before heading in a straight line for the point B?
I am pretty sure I would have to use the pythagorean theorem because if you draw the problem you get a triange with two sides given. Plus I denoted [math] dr/dt [/math] to be the speed on the road which is 4 mph, and [math] do/dt [/math] to be the speed off road which is 2 mph. I just don't know how to find my objective function. Any help would be appreciated.
0 
I noticed that if I type .9999999999 (ten nines) into my TI83 calculator and press enter, it gives me the answer to be .9999999999 (ten nines), But if I type .99999999999 (eleven nines) into my calculator and press enter it gives the answer to be one. I suppose my TI83 rounds to the 10th decimal place.
0 
For number 3, I thought I would use the logarithmic power rule (not sure of the real name) and therefore the exponent, sinx, can be written as the first term in problem. Then I used the product rule to find the derivative..
[math] y= (\ln x)^{\sin x} [/math] is the same as [math] \sin x\ln x [/math]
0 
Ok, thanks a lot.
0 
Can you tell if those answers are right?
0 
1) Find [math] \frac{d}{dx} log(lnx) [/math]
I assume that the log has a base of 10, so I got
[math] \frac{1}{x(lnxln10)} [/math]
2) Find the slope of the line tangent to the graph [math] cos(xy)=y [/math] at [math] (0,1) [/math]
[math] sin(xy)(y)+(xy')=y' [/math]
[math] ysin(xy)=y'(xy') [/math]
[math] \frac{ysin(xy)}{1x}=y' [/math]
Then I just keep getting 0 when I substitute (0,1) in...
3) If [math] y=(lnx)^{sinx} x>1, [/math] Find [math] y' [/math]
[math] sinxlnx=sinx\frac{1}{x}+(cosx)(lnx) [/math]
[math] \frac{sinx}{x} +cosxlnx [/math]
[math] 1+cosxlnx [/math]
0 
I think the second one has to do with the purple squares in the background.
0 
This problem reminds me of the many examples that Richard Dawkins gave in his book, The Selfish Gene.
0 
11131221133112132113212221 whew.
0 
Can you please check if my answer is correct.
[math] y=sin(sin(sinx)) [/math]
[math] y'=cos(sin(sinx))cos(sinx)cosx [/math]
(My calculus professor doesn't want our answers simplified.)
0 
ok, thanks.
0 
[math] g^{(n)}(x)=n(1^n)e^{x}+(1^n)xe^{x} [/math]
0 
How do you format your math work to look bold and easier to read?
0 
So would my formula be g^n(x)= n(1^n)e^x+(1^n)xe^x. I know there must be an easier way to write that.
0 
The inductive proof is: show true for n=1, assume true for n=k and show true for n=k+1, right?
0 
so e^x derived is e^x.... We haven't covered that yet.
Now I'm getting
g'(x)=e^xxe^x
g''(x)=2e^x+xe^x
g'''(x)= 3e^xxe^x
and so on, but I have no idea how to make an explicit formula out of that because the negatives are alternating.
0 
well I did write it out, this is what I got.
g'(x)= xe^x+e^x
g"(x)= xe^x+2e^x
g'''(x)= xe^x+3e^x
so I concluded that the formula would be g^n(x)= g(x)+n(e^x). I'm just not sure if my math is right.
0 
So would it be g^n(x)=g(x)+n(e^x)..... I'm assuming that the derivative of e^x is e^x....
0 
This is the problem in my book. If g(x)=x/e^x, find g^(n)(x). I don't really understand what the problem is asking me to find. It is in the differentiation section of the book, if that helps at all. I think it may be asking for a formula... By the way, the n in the formula represents how many times to take the derivative of g(x).
0 
Thank you so much!
0 
Can someone tell me the limit of (x/(2x2))(1/((x^2)1)) as x approaches 1.
0
The vegetative state and awareness
in Anatomy, Physiology and Neuroscience
Posted
That's interesting.