Question

Calculus help. Will reward a medal

Answer 1

what's the question

Answer 2

http://gyazo.com/7063e2abf4c356f8ec5b39ca328fa15c

Answer 3

so have you found f' or f'' yet?

Answer 4

yes

Answer 5

well we aren't really going to use the f'
we just needed the f' to find f''

Answer 6

ok

Answer 7

find the places where you have the concavity is 0
or in other words first solve f''(x)=0

Answer 8

That's where I'm stuck at

Answer 9

you should be able to factor the expression that is called f''

Answer 10

can i see your f''?

Answer 11

\[f''(x)=12x ^{2}-24x=0\]

Answer 12

So do you see any common factors among the terms 12x^2 and -24x ?

Answer 13

12?

Answer 14

what about the factor x?

Answer 15

okay so we have 12x(x-2)?

Answer 16

yes