{3,6,9,12}∪{2,5,7}
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{3,6,9,12}∪{2,5,7}
(1/2-3-5/9+5/6-7/12)*(-36)
全集I={1,2,3,…,9},(CIA)∪(CIB)={2,3,4,6,7,8},(CIA)∩B={3,7},(CIA)∪B={1,3,5,6,7,8,9},求A,B
1+2+3+4+5+6+7+8+9+12
2 3 4 5 6 7 8 9 12 快,
集合A={1,3,5,7,9} 集合B={2,4,6,8,10} A∪B=?
6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12
急*2**7******12**7*5*5***3*9***9*4**8*3**5*6**1*7**8*2***8*7***6*9*6**41******3**5*
(3/4+5/6)×12 7/9×5/7+7/9×2/5 15/17×18 3/7-6/13×3/7
U=A∪B={1,2,3,4,5,6,7,8,9,10},A∩B={3,4,5},求B
24乘5/6,3/5除以7/8,5/12乘4/25,7/12除以7/9,一除以11/12,2/3乘以6/5
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