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avatar+500 

What is the inverse of $f(x)=4-5x$?

 May 6, 2021
 #1
avatar+956 
+1

\(f(x) = y = -5x + 4\)

 

\(y - 4 = -5x\)

 

\(\frac{4 - y}{5} = x\)

 

---> \(\boxed{f^{-1}(x) = \frac{4 - x}{5}}\)

 May 6, 2021
 #3
avatar+1971 
0

Hello, I haven't seen you on in a long time. :))

 

=^._.^=

catmg  May 6, 2021
 #2
avatar+1971 
+1

replace f(x) with x

x = 4 - 5f(x)

4-x = 5f(x)

f(x) = (4-x)/5

 

=^._.^=

 May 6, 2021

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