Question

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

Answer 1

y=(x-1)/2

Explanation:

Given: f(x)=2x+1

Rewritten function: y=2x+1

Swap x and y: x=2y+1

Solve for y:

x-1=2y

(x-1)/2=y

y=(x-1)/2

So the inverse is y=(x-1)/2