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Let f(x) = (x + 2)/(x - 2).  Find the inverse of the function f(x).

 May 23, 2020
 #1
avatar+738 
+1

hi guest!

 

 f(x)=x+2x2

 

To find the inverse, you can first replace f(x) for y. y=x+2x2

 

1. we replace the x with y.  x=y+2y2

 

2. cross multiply:

 x(y2)=y+2

xy2x=y+2

xyy=2x+2

y(x1)=2x+2

 

3. divide both sides by x-1: y=2x+2x1

 

And that's the answer! y=2x+2x1

 

 

 

i hope this helped you!

:)

 May 23, 2020
 #2
avatar+738 
0

PS. here's a good youtube video about finding inverses! https://youtu.be/2zeYEx4eTdc?t=505

 May 23, 2020

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