6. Let f(x,y) = xey/(xy + 3) for xy > 0. What is
|
A. ey/y |
B. –3ey/(xy + 3)2 |
C. 3ey/(xy + 3)2 |
|
D.(2xyey + 3ey)/(xy + 3)2 |
E. (ey - xyey)/(xy + 3) |
Solution: The answer is C
Use the Quotient Rule and the Product Rule to find the partial derivative of f with respect to x, as follows:
