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Let A = {x ∈ Z | x = 5a+2 for some integer a}, B =...
Let A = {x ∈ Z | x = 5a+2 for some integer a}, B = {x ∈ Z | x = 10b−3 for some integer b}. Prove or disprove the statements. 1. A ⊆ B 2. B ⊆ A
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