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涉及一些较繁杂的求值问题,若巧构造函数利用函数的单调性妙求解,则有出奇制胜事半功倍之效,下面举例说明.
Involving some of the more complex evaluation problems, if the clever constructor uses the monotonicity of the function to solve the problem, then there is a curious effect that can be more effective. Here is an example.