tags: 高一數學、最大最小值、算幾不等式
基礎定義
實數 $a,b>0$,則 $\frac{a+b}{2} \ge \sqrt{ab}$ 恆成立,等號成立於 $a=b$ 時。
題目分析
此類題型應用於求「極值」
給定 $a+b$ 為定值,可以求 $ab$ 最大值
給定 $ab$ 為定值,可以求 $a+b$ 最小值
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