Question

If f(x)=5x, what is f^-1(x)

Answer 1

f^-1(x) = _x__

5

Explanation:

Answer 2

`{f}^( - 1) (x) = (x)/(5)`

Explanation:

f(x) = 5x

To find f^-1(x) equate f(x) to y

That's f(x) = y

y = 5x

Interchange the variables

x = 5y

Make y the subject by dividing both sides by 5

y = x/5

The final answer is

f^-1(x) = x/5

Hope this helps you.