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在初中数学竞赛中,常出现最值问题.其中某些求最值问题,若用判别式解决却很奏效,不失为一种好方法.下面通过举例说明其解法.
In the junior high school math competition, the question of the most value often arises. Some of them ask for the best value. If you use the discriminative solution, it is very effective. It is a good method. The following example explains the solution.