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存在性问题是数学开放性问题的一种,是近年来高考命题的一个新方向,其解法灵活且具有一定的探索性,有利于考查学生的探索能力.解决此类问题的方法是先假设存在,然后证明存在或说明不存在的原因.下面通过近年的高考题来说明:
Existentiality is a kind of mathematics open question. It is a new direction of the college entrance examination proposition in recent years. Its solution is flexible and has a certain exploratory nature. It is conducive to the exploration of students’ ability to explore. The solution to such problems is to assume the existence of , and then prove the existence or explain the reason does not exist. The following by the recent college entrance examination questions to illustrate: