Question

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

Answer 1

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

Explanation:

Answer 2

To find inverse function,
Let y = f(x)
y = 2x + 1
Now make x the subject.
2x = y - 1
x = (y - 1)/2
Then replace y by x.
f^-1(x) = (x - 1)/2