Precalculus Functions and Graphs
Inverse Functions
   Interactive Example 1

Given: f(x) = ax+b. Find: formula for f -1(x).

 
a =   
b =   

 

1. y =     Write y instead of f(x).
2. x =     Interchange x and y.
3.   = x   Solve the equation x = f(y) for y.
    =      
           
4. f-1(x) =     Write f -1(x) instead of y.


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