16coffeem 16coffeem
  • 14-11-2017
  • Mathematics
contestada

Find ƒ−1 for the function ƒ(x) = 4x + 2.

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kor2kotsovvk0q kor2kotsovvk0q
  • 14-11-2017
To find the inverse of a function you,
1.) Change f(x) to y
y = 4x + 2

2.) Switch the values of x and y
x = 4y + 2 

3.) Solve for y 
 x = 4y + 2
-2          -2
-----------------
x - 2 = 4y
------   ----
   4       4
y = x/4 - 1/2 

So, f-1 = x/4 - 1/2

Hope this helped!
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