照招
幼苗
共回答了22个问题采纳率:86.4% 举报
U={x|2≤x≤24,x∈N*}={2,3,4,5,...,24},
A,B是U的子集,A={x|x=2n,n∈N*}={2,4,6,8,...,24},B={x|x=3n+1,n∈N*}={4,7,10,13,...22},
所以A∪B={2,4,6,7,8,10,12,13,14,16,18,19,20,22,24},
Cu(A∪B)={3,5,9,11,15,17,21,23},
又C={x|x是素数},
所以Cu(A∪B)∩C={3,5,11,17,23}
1年前
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