Question

Evaluate the composite function, where
f(x) = 5x + 3, g(x) = x2 − 5x, and h(x) = 4 − 3x2.
(f o f)(4)

Answer 1

Basically you have:
5(5x+3)+3

Start by plugging 4 into the x.

Answer 2

Giving you:
5(23)+3

...you should be able to take it from there pretty nicely.

Answer 3

do I use the 5x+3 for the g(x) and h(x) as well?

Answer 4

No. You're only concerned with f(f(x)). g(x) and h(x) might be used in a different problem. Not this one.

Answer 5

ok. Thanks

Answer 6

No sweat! Take care!