Question: Let f be a real-valued function whose domain is a subset of R. Show f is continuous at co in dom(f ) if and only

Let f be a real-valued function whose domain is a subset of R. Show f is continuous at co in dom(f ) if and only if, for every sequence (Xn) in dom(f) \\{co} converging to co, we have lim f (n) = f(x0)

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