Question

find the derivative of the function f(x) = x(3x-12)^4

Answer 1

product plus chain rule

Answer 2

Product rule:
(derivative of (x)) * (3x-12)^4 * (derivative of (3x-12)^4)*x
Use chain rule to get the derivative of (3x-12)^4

Answer 3

See video here http://www.khanacademy.org/math/calculus/v/the-chain-rule

Answer 4

remember the chin rule:
f(g(x))=f'(g(x)g'(x)

Answer 5

sometimes written as
f(u)=f'(x)u'

Answer 6

(3x-12)^4
->u=3x-12
f(u)=u^4

Answer 7

find the derivative of the function f(x)=x(3x-12)^4 .. so f'(x) =?

Answer 8

-_-

Answer 9

See the video link I gave above. It is very helpful indeed