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探求法确定函数单调区间 ,是指用定义法求函数单调区间过程中 ,因无法直接确定因式的正负号而利用解不等式的方法求得单调区间的方法 .作为推理证明的一种补充手段 ,它对于学生而言比较容易接受 ,而且不改变思维的延续性与整体性 .下文通过一些典型的例题来剖析探求法的解题实?
The search method to determine the monotonic range of functions refers to the method of finding the monotonic interval by using the solution inequality method because the sign of the factor can’t be directly determined by using the definition method to find the monotonous interval of functions. It is a supplementary method to prove the reasoning. It is easier for students to accept, and does not change the continuity and integrity of the thinking. Below, through a number of typical examples to analyze the solution to the problem?