Question

Let f(x) = 2x+3 and g(x) = -x^2 + 5 find ( f of f)(x)

Answer 1

ff(x)
f(f(x))
f(2x+3)
2(2x+3)+3

Answer 2

its just like substituting

Answer 3

Looks like they're giving g(x) to throw you off!

Answer 4

28 was the rigth answer (:

Answer 5

yay!

Answer 6

@Lib Libs Does it make sense to plug the eqn of f(x) into f(x)?

Answer 7

Yes. It does. It's just asking for f of f

Answer 8

Wait. ; - ; i got confused.

Answer 9

f(x) = 2x+3)

f(f(x)) = f(2x+3)

f(2x+3) = 2(2x+3) +3

So you're just plugging your function into itself.

Answer 10

4x + 3

2x + 3

4x + 9

4x2 + 12x + 9
It would be 2x +3?

Answer 11

Not quite...

f(2x+3) =4x +6 +3
=4x+9

Answer 12

Darnit D< I will get it right.

Answer 13

I got two right today :/