Question

Let f(x) = 2x + 2. Solve f-1(x) when x = 4.

1

3

4

10

Answer 1

@UditKulka

Answer 2

@ganeshie8 @sarahg95

Answer 3

@John_ES

Answer 4

i think its 10

Answer 5

First, calculate the inverse function,
\[y=2x+2\Rightarrow x'=2y'+1\Rightarrow y'=(x'-1)/2\]So\[f^{-1}(x)=(x-1)/2\] With x=4,
\[f^{-1}(4)=3/2\]

Answer 6

@John_ES thanks :)