名校
1 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/733515693c7ecf140d71637c24c14aa5.png)
(1)若
对
恒成立,求
的取值范围;
(2)数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/733515693c7ecf140d71637c24c14aa5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116698bad15e048ce03184bfcef1e50f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba2139aeef0ddd2ceeb13a4fd966f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a7305b8d7a0930e10b454e3a48bbd5.png)
您最近一年使用:0次
2019-07-01更新
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805次组卷
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2卷引用:2019年广东省珠海市高三9月数学理试题