Question

What is the inverse of the function f(x) = 2x – 10?

Answer 1

The inverse f-1(x) = ( x + 10)/2.

Explanation:

f(x) = 2x - 10

Find x in terms of f(x):

2x = f(x) + 10

x = (f(x) + 10))/ 2

Replace x by the inverse f-1(x) and f(x) by x:

f-1(x) = (x + 10)/2.