Question

Find the inverse of f(x) = 2x + 3

Answer 1

Answer:

f−1(x)=x−32

Explanation:

Follow the steps:

f(x)=2x+3

1- replace f(x) with y →y=2x+3

2- simply switch x and so the equation looks like x=2y+3

3- use algebra to solve for y. (isolate y)
x=2y+3

x−3=2y

x−32=y

This is the inverse function and is written as

f−1(x)=x−32