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problem 23 please :)

Problem 23. Recall from Problem 21 the equivalence relation ~ on the set of rational Cauchy sequences C. Define 〈z) E C to be

and here is Q.21

Problem 21. Let C be the set of all Cauchy sequences in Q, so an element of C is a sequence of rational numbers(x)-(m)%1 such

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problem 23 please :) and here is Q.21 Problem 23. Recall from Problem 21 the equivalence...
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