Question

How do I solve....

Assume f(x) = 2x + 8 and g(x) = 5. What is the value of (g o f)(3)?
5
70
18
15

Answer 1

you will have to plug in f(x) into the g(x) for x, to find gof(x).
Since there is not x in the g(x), your gof(x) (just like g(x) ) is
gof(x)=5

Answer 2

when you plug in 3 for x, you still have 5 because there is no x in the gof(x)=5,
so gof(anything)=5 in this case.

Answer 3

solve g(f(x))
\[g(f(x))=g(2x+8)=5\]

Answer 4

the anser will be 5.