Answers

2016-06-24T22:45:54+08:00
D= {6,12,18,24} U= {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25 D'= {1,2,3,4,5,7,8,9,10,11,13,14,15,16,17,19,20,21,22,23,25} C= {3,6,9,12,15,18,21} U= {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25} C'= {1,2,4,5,7,8,10,11,13,14,16,17,19,20,22,23,24,25} D'={1,2,3,4,5,7,8,9,10,11,13,14,15,16,17,19,20,21,22,23,25} C'= {1,2,4,5,7,8,10,11,13,14,16,17,19,20,22,23,24,25} D' U C'= {1,2,3,4,5,7,8,9,10,11,13,14,15,16,17,19,20,21,22,23,24,25} U= {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25} B= {3,6,9,12,15,18,21} B'= {1,2,4,5,7,8,10,11,13,14,15,16,17,19,20,22,23,24,25} D' U C'= {1,2,3,4,5,7,8,9,10,11,13,14,15,16,17,19,20,21,22,23,24,25} B'= {1,2,4,5,7,8,10,11,13,14,15,16,17,19,20,22,23,24,25} (D'UC')-B'= {3,21}
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