救救俺.看不懂.集合A={1 3 5} B={M N 6}且A∩B={1 5 }求M+N的值2:设集合A={X|X(X平方-1)=0} B={X|X平方-X=0} 求1:A∩B 2:A∪B3:设集合P={x|-1小于X小于1} Q={X|0小于等于X小于等于2
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