Question

What is the value of f[g(3)] for the functions f(x) =x+2 and g(x) = 5x - 1

Answer 1

Explanation:

In this case we know the composition of f and g is

`f(g(x))=f(5x-1)=5x-1+2=5x+1`

Thus if we change x by 3 we get

`f(g(3))=5(3)+1=16`