Question

For the function f(x) = 9 (5√x + 2), find f-¹(x).

Help a brother out please

Answer 1

Explanation:

The first step is to switch the x and the y in the function, giving us:

`x=9(y^(1/5)+2)` then work towards solving for the "new" y:

`(x)/(9)=y^(1/5)+2` and

`(x)/(9)-2=y^(1/5)` and finally raise each side to the 5th power giving us

`((x)/(9)-2)^5=f^(-1)(x)`