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Sxy Let f(x,y) = muff (any) at 0 0' if (my) = 0 [a] Show that (x'y1)i_120'0)f(x, 3!) does not exist. (b) Is f differentiable

Sxy Let f(x,y) = muff (any) at 0 0' if (my) = 0 [a] Show that (x'y1)i_120'0)f(x, 3!) does not exist. (b) Is f differentiable at (0,0)? Explain why or Why not

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