SOLUTION: I have been given the function f(x)=4x/(x+1). I was told to find the inverse function. So I got f^-1(x)=-x/(x-4). First, is this correct? Second, How do you find the DOMANIN and RA

Algebra ->  Algebra  -> Rational-functions -> SOLUTION: I have been given the function f(x)=4x/(x+1). I was told to find the inverse function. So I got f^-1(x)=-x/(x-4). First, is this correct? Second, How do you find the DOMANIN and RA      Log On

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Question 631484: I have been given the function f(x)=4x/(x+1). I was told to find the inverse function. So I got f^-1(x)=-x/(x-4). First, is this correct? Second, How do you find the DOMANIN and RANGE?

Answer by ewatrrr(10682) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

f(x)=4x/(x+1)

 I = -x/(x-4)  Yes, good work.

if you are finding the Domain and Range of the Inverse function...

domain: Denominator cannot be zero.  Domain is  {x  | x ≠ 4 }

Range:  value of f(x) as x approaches infinity

that would  y = -1