9. three pairs of functions are given below. for which pairs are f and g inverses of each other? show work to support
your reasoning. if a domain is not specified, assume it is the set of real numbers.
a. f(x) = x / x + 1, x ≠ −1 and g(x) = −x / x − 1 , x ≠ 1
b. f(x) = √x − 1, x ≥ 0 and g(x) = (x + 1)2
c. f(x) = −0.75x + 1 and g(x) = − 4 / 3 x − 4 / 3