Show that f (x, y) = _ 4xy x2+y2 for (x, y) _= (0, 0) 0 for (x, y) = (0, 0) is
Chapter 10, Problem 23(choose chapter or problem)
Show that f (x, y) = _ 4xy x2+y2 for (x, y) _= (0, 0) 0 for (x, y) = (0, 0) is discontinuous at (0, 0). (: Use 17.)
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