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用初等函数方法求(?)+(ny)型最值的常用方法中.利用直线的裁距来求.有其巧妙之处,不失为一种好方法,值得重视.
Using the elementary function method to find the most common method of (?)+(ny) type. Using the slash of the straight line to seek. There are clever, it is a good method, it is worth paying attention to.