Can someone explain this question?
You need to derive your function with respect to
Ok, I can be wrong but your function can be derived as:
Let us set this equal to zero:
This is what I got.
Given expression is
Using product rule
To meet the given condition
To find roots of
From both (3) and (4)
This solution is purely theoretical as such this equation has no solution in real or complex numbers.
As such only possible solution is as given in equation (2)