29. Define functions f and g on [-1, 1] by f (x) = {* Cos(1/x), ifx #0; 0, and g(x) =0 cos(1/x), if x #0; if x = 0. if x = 0; Prove that f is continuous at 0 and that g is not continuous at 0. Explain why these functions are continuous at every other point in [-1, 1].

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