How do you inverse the function f(x)2x 1?

Answer 1

I will assume your function is f(x) = 2x + 1 (answers.com eliminates some symbols from questions).

First, you write this as:

y = 2x + 1

Next, you exchange "x" and "y":

x = 2y + 1

This is not strictly necessary, but the idea is that the final result is, once again, expressed in terms of "x".

Finally, you solve this new equation for "y":

y = ...

You can then write this as a function if you wish; just replace "y =..." with "f(x) =...".