Question

For which function is f(x) not equal to f-1(x)

f(x)=2-x
f(x)=2/x
f(x)=-x
f(x)=2x

Answer 1

The answer is D.

for f(x)=2x , f^(-1)(x) = x/2

Answer 2

For this case we have the following function:

`image`

Rewriting the function we have:

`image`

From here, we clear the value of x to find the inverse of the function.

We have then:

`image`

Then, rewriting the variables we have that the inverse function is:

`image`

Answer:

function f (x) that not equal to f-1 (x) is:

`f (x) = 2x`