Posted by Anonymous on Sunday, October 7, 2012 at 10:15pm.
What is the derivative of (x^2+4x+5)/(x^32x)?

Math  Reiny, Sunday, October 7, 2012 at 10:31pm
quotient rule !
dy/dx = ( (x^3  2x)(2x + 4)  (x^2 + 4x + 5)(3x^2  2) )/(x^3  2x)^2
= etc

Math  Anonymous, Sunday, October 7, 2012 at 10:34pm
I know you use quotient rule. Is the answer (x^48x^317x^2+8x+10)/(x^32x)^2
Thanks Reiny!

Math  Reiny, Sunday, October 7, 2012 at 10:42pm
If you are taking Calculus, surely you should have no difficulty expanding and simplifying
(x^3  2x)(2x + 4)  (x^2 + 4x + 5)(3x^2  2)
I will leave that up to you to check if your answer is correct.
(hint: the answer is yes)
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