SOLUTION: The function f(x)=7x+3 is one-to-one. Find an equation for f^-1(x), the inverse function f^-1(x)=?

Algebra ->  Functions -> SOLUTION: The function f(x)=7x+3 is one-to-one. Find an equation for f^-1(x), the inverse function f^-1(x)=?      Log On


   

Question 1115652: The function f(x)=7x+3 is one-to-one.
Find an equation for f^-1(x), the inverse function
f^-1(x)=?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Quick way is to switch x and y.

7y%2B3=x
7y=x-3
y=%28x-3%29%2F7
y=x%2F7-3%2F7

f%5E%28-1%29%28x%29=x%2F7-3%2F7