The function is .
Find an equation for the inverse function.
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Let and solve for
in terms of
.
\
Let .
.
Differentiate on each side with respect to .
.
The function is
which can be neither positive or negative depending on the value of
.
The domain of is
.
Since there is negative terms depending on the value of , the function
is not monotonic.
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is not a monotonic and it doesnot have an inverse function.
Inverse function of does not exist because the function
is not a monotonic.