Question: 6. (a) Let =(z,y) = 1 - zy'. For all (z, y) compute 8roy (b) By differentiating both sides of the equation /(tx, ty) =

6. (a) Let =(z,y) = 1 - zy'. For all (z,

6. (a) Let =(z,y) = 1 - zy'. For all (z, y) compute 8roy (b) By differentiating both sides of the equation /(tx, ty) = P/(z.y) with respect to t and then setting f = 1, show that of(. y) + V 2/ (z,y)

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