SOLUTION: find the inverse, f^-2(x) of f(x)=1/2x-2 A.f^-2(x)=2x+4 B.f^-2(x)=2x-2 C.f^-2(x)=-2x+4 D.f^-2(x)=2x-4 Which is the answer?

Algebra ->  Inverses -> SOLUTION: find the inverse, f^-2(x) of f(x)=1/2x-2 A.f^-2(x)=2x+4 B.f^-2(x)=2x-2 C.f^-2(x)=-2x+4 D.f^-2(x)=2x-4 Which is the answer?      Log On


   

Question 612484: find the inverse, f^-2(x) of f(x)=1/2x-2
A.f^-2(x)=2x+4
B.f^-2(x)=2x-2
C.f^-2(x)=-2x+4
D.f^-2(x)=2x-4
Which is the answer?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,re TY, Yes, A is correct choice. 

Find: f%5E-1%28x%29 

f(x)=1/2x-2   ||using y for f(x)

 y = x/2 - 2    ||'switching' the y and the x to find the inverse

 x = y/2 - 2

 x + 2 = y/2    || solving for y

 2x+4 = y

f%5E-1%28x%29=+2x%2B4