新定义题型是近些年高考经常出现的一种创新的命题形式,就试题的难度而言,简单题有之,中档题有之,压轴题亦有之,且不乏一些经典题目.下面仅就解集合新定义题的常见策略做些盘点,以期能对大家的学习有所启发和帮助.1.化归例1若x∈A则有1/x∈A就称A是“亲密组合”集合,那么集合M={-1,0,1/4,1/3,1/2,1,2,3,4}的所有非空子集中,是“亲密组合”集合的个数为().(A)5(B)9(C)31(D)32解析根据“亲密组合”集合的定义可知满足条件的集合应该就是从如下的5个集合 The new definition of the types of questions in recent years, college entrance examination is often an innovative form of proposition, the difficulty of the questions, the simple title, mid-range title, there are some finale problems, and there are some classic topics below only A solution to the common definition of the new set of books to do some inventory strategy, in order to be able to inspire everyone's learning and help.1.Givendex 1 if x∈A then 1 / x∈A is called A “intimate combination ”, Then in all non-empty subsets of the set M = {-1, 0, 1/4, 1/3, 1/2, (A) 5 (B) 9 (C) 31 (D) 32 Analysis According to the definition of the “intimate combination” set, it can be seen that the set satisfying the condition should be from the following five sets