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Consider the two sets A = {n EN:n is both a perfect square and a...

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Consider the two sets A = {n EN:n is both a perfect square and a perfect cube}and B = {r N:r = 0mod 7 or r = 1mod 7). If one wishes to prove A = B. then which of thefollowing describes a valid proof strategy? Select only one answer.(a) Suppose z A and prove r e B, and then suppose r&A and show r & B.(b) Suppose z E A and prove z B.(c) Suppose z An B and conclude re AUB.(d) Suppose z B and conclude z E A. and then suppose z E A and conclude a contradiction.(e) Suppose z B and conclude z A.

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