Question

I GIVE MEDALS

Given f(x) = 2x + 3 find (f º f)(x):
Select one:
a. 2x^2 + 13
b. 4x + 9
c. 4x^2 + 9
d. 4x^2 + 13

Answer 1

I believe this is just multiplying the equation by itself so it'd be (2x+3)(2x+3)

Answer 2

so b?

Answer 3

(f º f)(x) = f(f(x))

Answer 4

Looks like c to me

Answer 5

Because 2x*2x multiplies the x terms and the 2's giving you 4x^2

Answer 6

No @JoshR1213 it's not multiplication.

Answer 7

Oh, is it squaring?

Answer 8

Still gives you the same answer I gave

Answer 9

Just replace x with f(x) like this : (f º f)(x) = f(f(x)) = 2(2x+3) + 3

Answer 10

so it is c

Answer 11

cause that would be 4x^2+9

Answer 12

If you solve it the way he set it up it's b

Answer 13

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

Answer 14

oh ok so there is no 4x^2 its just 4x

Answer 15

If he's right, yes

Answer 16

ok