Question: see attached Let f : R - R be defined as 7- 3 - 13 f (x, y) = x 2 + 1/2 ' if

see attached

Let f : R - R be defined as 7- 3 - 13 f (x, y) = x 2 + 1/2 ' if (x, y) # (0, 0) 0, if (x, y) = (0, 0) Prove that that fx exists for all (x, y) E R but fx is not continuous at (0, 0)
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