Question: (a) Define partial derivatives for function of two variables. Why do you use partial derivatives? For the function f(x, y) = 2z (x, y?)

(a) Define partial derivatives for function of two variables. Why do you

(a) Define partial derivatives for function of two variables. Why do you use partial derivatives? For the function f(x, y) = 2z (x, y?) respectively. 1 I'y-ry find fr(x, y) and fy(x,y) at the points (0,0), (a,b) and

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