(a) Write expressions for the partial derivatives f x (a, b) and f y (a, b) as...
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(a) Write expressions for the partial derivatives fx(a, b) and fy(a, b) as limits.
(b) How do you interpret fx(a, b) and fy(a, b) geometrically?
How do you interpret them as rates of change?
(c) If f (x, y) is given by a formula, how do you calculate fx and fy?
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