Question: Let f ( x , y ) = x y 4 + 4 . Evaluate d e l f d e l y at (

Let f(x,y)=xy4+4. Evaluate delfdely at (x,y)=(7,-1) and interpret the results.
delfdely(7,-1)=(Simplify your answer.)
Let f ( x , y ) = x y 4 + 4 . Evaluate d e l f d

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