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高中数学涉及知识多,貌似孤立,但其实相互之间都有联系。尤其是其中涉及的一些数学思想,更能起到提纲挈领的作用,有利于加强各章节之间的联系。兵法有“欲擒故纵”之术,数学中有“正难则反”(即逆向思维)思想,可谓异曲同工,岂不妙哉。“正难则反”数学思想统筹的高中内容有:(1)补集思想,即A∪C_UA=U(U是全集,即我们研究的集合);(2)事件A的对立事件记为A,即任意一次试验,
High school mathematics involves a lot of knowledge, seemingly isolated, but in fact are linked to each other. In particular, some of the mathematical ideas involved in it can play a more important role in synopsis and help to strengthen the links among the chapters. The art of warfare has the idea of “trying to catch the enemy in the future” and the idea of “being in the opposite direction” (ie, thinking in the opposite direction) in mathematics can be described as similar to the same song. “Mathematics is the opposite” High school mathematics thought co-ordination of the contents are: (1) complement theory, that A∪C_UA = U (U is the complete set, that is, the collection of our research); (2) A, that is, any one test,