构造向量，利用向量内积进行求解，为函数最值问题的解决，开辟了一种新的思路和方法。

But the author explored a new way to solve this problem, which is to wake up vector and make us of the internal product to go on solution.

youdao

构造向量，利用向量内积进行求解，为函数最值问题的解决，开辟了一种新的思路和方法。

But the author explored a new way to solve this problem, which is to wake up vector and make us of the internal product to go on solution.

youdao