Question

If
f(x) = x2/(5 + x), find f ''(5)

Answer 1

can u find f'(x) by differentiating f(x) .. ?

Answer 2

find the second derivative and then plug in 5

Answer 3

I'm assuming this

Answer 4

your drawing is awesome

Answer 5

thanks :D
anyway, use division rule for derivatives twice and then plug in 5. careful: it will be a mess

Answer 6

can you find the 1st derivative first before finding the 2nd derivative?

Answer 7

suppose to. otherwise you can't do the second

Answer 8

so there's no shortcuts?

Answer 9

no use division rule for derivatives

Answer 10

how?

Answer 11

http://www.mathwords.com/d/derivative_rules.htm

Answer 12

division rule is to take the bottom part of the fraction and square it. then it goes like this leave the second part alone deal with the first - leave the first alone deal with the second