名校
解题方法
1 . 已知数列
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aedfa8f30e122365dfa1d875a9a2a22.png)
(1)证明:数列
是等差数列,并求数列
的通项公式;
(2)设
,数列
的前
项和为
,若
恒成立,试求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aedfa8f30e122365dfa1d875a9a2a22.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ad738dc3a9c27a05fbb0eb65d403d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/24e2229881f9d119f44e64e6c0164458.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2023-05-13更新
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4卷引用:河南省商丘市睢阳区商丘市第一高级中学2023-2024学年高三上学期期中数学试题
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