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Mathematics
Problem
Find the inverse of the function
f
(
x
)
=
{
x
;
x
<
1
x
2
;
1
≤
x
≤
9
27
x
;
x
>
9
f(x) = \begin{cases} x & ; x < 1 \\ x^2 & ; 1 \le x \le 9 \\ 27\sqrt{x} & ; x > 9 \end{cases}
f
(
x
)
=
⎩
⎨
⎧
x
x
2
27
x
;
x
<
1
;
1
≤
x
≤
9
;
x
>
9
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