Give an Appropriate Answer $f ( x , y ) = x y e ^ { - y }$

question 183

Multiple Choice

Give an appropriate answer.
- $f ( x , y ) = x y e ^ { - y }$

• A) \(\frac { \partial f } { \partial x } = y ^ { - y } ; \frac { \partial f } { \partial y } = - x y e ^ { - y }\)
• B) \(\frac { \partial f } { \partial x } = y e ^ { - y ; } \frac { \partial f } { \partial y } = x e ^ { - y } ( 1 - y )\)
• C) \(\frac { \partial f } { \partial x } = y e ^ { - y } ; \frac { \partial f } { \partial y } = x e ^ { - y }\)
• D) \(\frac { \partial f } { \partial x } = y e ^ { - y } ; \frac { \partial f } { \partial y } = x e ^ { - y } ( y - 1 )\)

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