名校
解题方法
1 . 函数
的部分图象如图所示.
![](https://img.xkw.com/dksih/QBM/2021/10/21/2834230574768128/2834301581647872/STEM/4f935862-77aa-44a7-9f83-2fd8ca04f0ef.png?resizew=177)
(1)求函数
的解析式;
(2)已知数列
满足
,且
是
与
的等差中项,
①求证:数列
是等比数列;
②求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27cd15ee656d39a864fbecf781f23c5.png)
![](https://img.xkw.com/dksih/QBM/2021/10/21/2834230574768128/2834301581647872/STEM/4f935862-77aa-44a7-9f83-2fd8ca04f0ef.png?resizew=177)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d10a513447f40b5130c7527ae289b2.png)
①求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d17d72d1d20d385920c3d9da6bed8bb.png)
②求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2021-10-21更新
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2卷引用:陕西省部分名校2021-2022学年高三上学期10月月考文科数学试题