Posted by Sean on Tuesday, January 22, 2008 at 9:08pm.
I did this down below, after the one drwls answered
copied:
It is so similar that you should be able to do it the same way. Draw the triangle and you have sqrt(1-4x^2)
f(x) = (1-4x^2)^.5
f'(x) = .5 [(1-4x^2)^-.5] (-8x)
= -4x/sqrt(1-4x^2)
Oh.
But the text book I'm using gives me the answer:
Sqrt(1-4x^2)
No denominators or anything.
That is just the first step.
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