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  3. 7 let xd be a metric space i for x...

Question: 7 let xd be a metric space i for x...

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7. Let (X,d) be a metric space (i) For x, y,z X, prove that d(x, z)-d(y, 2) S d(x,). (ii) Suppose (xn) is a convergent sequence in X. Prove that (xn) is bounded; that is, prove that xn nEN) is a bounded subset of X

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