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September 16, 2014

Homework Help: Math CONTINUATION OF QUESTION FROM bobpursley

Posted by KIKSY on Thursday, March 10, 2011 at 9:05pm.

Thank you for answering the question before bobpursley,
I understand how you did the deriv of inside, outside, but how do I now do the second derivative since you have the extra -18x^2 in the numerator??
Thank you very much! (I suppose I have to brush up on my derivatives)


Posted by KIKSY on Thursday, March 10, 2011 at 8:52pm.


What is the first and second derivative of 3/(1+2(x^3)) ?
im tempted to do the quotient rule, but this looks weird to me...any advice would be greatly appreciated!!



Math - bobpursley, Thursday, March 10, 2011 at 8:55pm
let u=(1+2x^3)

then f= 3u^-1
f'= -3 *u^-2 *u'

but u'= 6x^2

so f'= -3*6x^2 /(1+2x^3)^2

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