prove the statement(About set)
2012-04-06 8:59 am
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回答 (1)
2012-04-06 11:36 am
✔ 最佳答案
B + C - B∩C = B∪C ...... (1) A + C - A∩C = A∪C ...... (2) (1) - (2) :B - A - (B∩C - A∩C) = B∪C - A∪C By given that B∩C = A∩C and B∪C = A∪C , we have B - A - 0 = 0A = B
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