｛3,6,9,12｝∪｛2,5,7｝

｛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 设∪={X属于Z|0＜X≤10},A={1,2∪,4,5,9},B={4,6,7,8,10},C={3,5,7},求A∩B,( A的补集)∪...设∪={X属于Z|0＜X≤10},A={1,2∪,4,5,9},B={4,6,7,8,10},C={3,5,7},求A∩B,( A的补集)∪（B的补集）,（A∩B）∩C,（A∪B）∩C 已知集合A=｛1,2,3,4｝ B=｛3,4,5,6,7｝ C=｛6,7,8,9｝ 求（1）A∩B A∩B∩C （2）A∪B A∪B∪C已知集合A=｛1,2,3,4｝ B=｛3,4,5,6,7｝ C=｛6,7,8,9｝求（1）A∩B A∩B∩C （2）A∪B A∪B∪C 已知集合A={1,2,3,4,5},集合B={4,5,6,7,8,9},求A∩B和A∪B 设I={1,2,3,4,5,6,7,8,9}为全集,它的子集是A={1,2,3,4,5},B={1,3,5,7,9}.试求A∩B,A∪B 简算 12+2×3+3×4+4×5+5×6+6×7+7×8+8×9+9×1012+2×3+3×4+4×5+5×6+6×7+7×8+8×9+9×10简算 2/3×6×3/8,3/10×4/7×7/9,4/5×4/7×5/12,等于多少? 5/6+59+25+1/6+3/7+2/9+4/7+11/15+12/15+11/14+2/5+3/8+5/9+2/7