等差数列
中,
与
是
的两个极值点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7419eab350c5266ebd58156ea7e43a.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ee5cd1d0c6fa336ec7623d24220f74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/054c9e96dad7016007268e4b7e90e01d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7419eab350c5266ebd58156ea7e43a.png)
更新时间:2020-02-16 19:08:42
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