Question: Find where f(x, y) is given by (a) 3x 2 + 2xy + y 3 (b) (y 2 + x)e xy af X and af

Find

af X and af

where f(x, y) is given by

(a) 3x2 + 2xy + y3 

(b) (y2 + x)e−xy

af X and af

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