Question

How to solve this question?

Answer 1

-11.

Explanation:

f(x) = √(3 - 2x), x ≤ 3/2

let y = √(3 - 2x)

y^2 = 3 - 2x

2x = 3 - y^2

x = (3 - y^2)/2

So f-1(x) = (3 - x^2)/2

f-1(x) = (3 - 5^2) / 2 = -11.