Question

F(x) = (5x^3 + 4)^3 find second deravitive
F’(x) = 3(5x^3 + 4)3-1 (15x^2) = (45x2) (5x^3 + 4)2
F”(X) = (45x^2) (5x^3 + 4)2

Answer 1

(45x2)*2(5x3 + 4)*15x2] + [90x * 90(5x3 + 4)2]

Answer 2

is that correct?

Answer 3

If you just want to check:
http://www.wolframalpha.com/input/?i=d^2%2Fdx^2((5x^3+%2B+4)^3)

Answer 4

hmmmm in the addition part, where did that 90 in 90(5x3+4)2 come from?

Answer 5

chain rule for 45x^2

Answer 6

yes 90x is ok but it should be [90x * (5x3 + 4)2]

Answer 7

might be a typing mistake i guess!

Answer 8

haha

Answer 9

was it?

Answer 10

nah

Answer 11

i dont know how to open that up