Question

Assume that the function f is a one-to-one function, (a) f(8) = 9, find f ^ -1 (9)

Answer 1

(a) since we are given that f(8) = 9, the inverse of 9 is simply 8. Therefore, f^-1(9) = 8.

(b) Again, f is the inverse of f^-1, therefore, you simply switch numbers, and you get that f(-3) = -7.