Find all the first order partial derivatives for the following function.f(x, y) = xye-y
A. 
= ye-y; 
= xe-y(1 - y)
B. 
= ye-y; 
= xe-y
C. 
= ye-y; 
= xe-y(y - 1)
D. 
= ye-y; 
= - xye-y
Answer: A
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