What is the first derivative of the expression (xy)x = e?

1.	What is the first derivative of the expression (xy)x = e?
A.	0
B.	x/y
C.	–y [(1 + ln xy) / x)]
D.	–y [(1 – ln xy) / x2)]
Answer» D. –y [(1 – ln xy) / x2)]

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