# Let A = {n ∈ Z| n = 5r for some integer r} and B = {m ∈ z| m = 20s for some integer s}.

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Question description

Let A = {n ∈ Z| n = 5r for some integer r} and B = {m ∈ z| m = 20s for some integer s}.

a. is A C B? Explain (The C is suppose to be underlined)

b. is B C A? Explain (The C is suppose to be underlined)

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