Question

For which pairs of functions is (fog)(x)=x?

A) f(x)=x^2 and g(x)=1/x

B) f(x)=2/x and g(x)=2/x

C) f(x)=(x-2)/3 and g(x)=2-3x

D) f(x)=(1/2)x+2

Answer 1

A because (fog)(x) = f(x)g(x) = x^2 * 1/x = x

Answer 2

I had the on my test 20 minuets ago the answer is c. hope it helps! My intelligence level it high just like yours!