Question

What is the inverse of the function f(x) = 2x + 1?

Answer 1

Answer: y=(x-1)/2

Step-by-step explanation:

To find the inverse, you want to switch the y with x and x with y. Then, you solve.

y=2x+1                 [switch y with x and x with y]

x=2y+1                 [subtract both sides by 1]

x-1=2y                  [divide both sides by 2]

(x-1)/2=y

Now, we know that y=(x-1)/2 is the inverse.