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2. Find and sketch the domains for each of the following functions: (a) f(x, y) = (x2 -25)(y2 -16). (b) f(x, y) = tan-1 (2).

2. Find and sketch the domains for each of the following functions: (a) f(x, y) = (x2 -25)(y2 -16). (b) f(x, y) = tan-1 (2). 3. Find all the points for which the following function is continuous: f(x, y, z) = 2 Vax2+2

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