Question

Consider the functions f (x)=x^2 +9x and g(x)=1/x
f(g(-1)) is ... ?
g(f(I/2)) is ... ?

Answer 1

For the first question you
-Substitute x= -1 into g(x).
So g(-1) = 1/-1
Then you get -1 right?
So then afterwards you know g(-1) = -1
So f (-1) = ?
So now you use x=-1 and substitute it into x^2 +9x
Do you get it? :)

Answer 2

Yesss thank you @butterflydreamer

Answer 3

You're welcome! The second question follows the same method :)