Question

If f(x)= 2x then f ^-1(x)=


A. -2x
B. 1/2x
C. x-2

Answer 1

1/2x

Explanation:

f(x)=2x. This means that f=2 (since x=x)

2^-1= 1 divided by 2. 1/2= 0.5.

0.5(x)=1/2x.

Answer 2

You are supposed to simplify (2+h)^{2}-2*(2+h)