Question

If ƒ

a. = K, then which of the following must be true?
A) ƒ( K ) = a
B) ƒ -1( K ) = a
C) ƒ -1( a ) = K

Answer 1

(B)
if f(a) = K, then that means f sends (a) to (K).
the inverse function, f-1, goes back where you started, so f-1 sends (K) to (a).
f-1(K) = a.

Answer 2

If ƒ a. = K, then which of the following must be true?

A) ƒ( K ) = a

B) ƒ -1( K ) = a

C) ƒ -1( a ) = K

Explanation:

If ƒ (a) = K, when doing the inverse function we have that: ƒ - 1 (K) = a; changing the site values as the second inverse function of the first.

The answer is: B) ƒ -1 (K) = a