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Mathematics 12 Online
OpenStudy (anonymous):

Check my answer? http://prntscr.com/65yqd7

OpenStudy (curry):

Yep

OpenStudy (curry):

wait, no!

OpenStudy (curry):

it's an intersection, so {2,4}

OpenStudy (curry):

Sorry about that, saw the sign wrong.

OpenStudy (curry):

If it was a union, A U B, then your answer would be right.

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