Let f(x) = 6x + 1 and g(x) = -2x - 5. Compute (g*f)(x)?

1 Answer
Mar 15, 2018

gf(x)=-12x-7gf(x)=12x7

Explanation:

With composite functions, we work from the inside out. So for gf(x)gf(x), we do f(x)f(x), then we "g"g it.

#f(x)=6x+1

Sub this into g(x)g(x):

gf(x)=-2(6x+1)-5gf(x)=2(6x+1)5

=-12x-2-5=12x25

=-12x-7=12x7