Question

If f(x) =(x+2)/2 , then what is f^(-1)x ?

Answer 1

Put f(x)=y and then find x in terms of y, you will get:

\[ f(x) =\frac{(x+2)}{2} \implies f^{-1}(x) = 2x-2 \]

Answer 2

f inverse is written by writing x in terms of y implicitly, and then interchanging y and x, so now it becomes..