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Find A ∩ B if A = {4, 7, 10, 13, 17} and B = {3, 5, 7, 9}.
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Find A ∩ B if A = {4, 7, 10, 13, 17} and B = {3, 5, 7, 9}.

User CptRobby
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The "intersection" of two sets is the set of all members of the 2 sets that are in common. 3 and 4 are not in common here; 7 is; all the rest are not in common. Thus

A ∩ B = {7}
User RGe
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