1 . 已知数列
满足:
,设
表示数列
的前n项和.下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d199ece92c41c08b70f934b20c85cea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2 . 已知定义域为R的函数
的图象关于直线x=1对称,那么计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd3f08e2d7c9d5e7f212479941b5160.png)
的结果为______ .(ymin表示函数的最小值)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cdfca272709402ea36fa5de896d6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd3f08e2d7c9d5e7f212479941b5160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a881b909257c4a5bc1f8f738685f1d.png)
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3 . 记椭圆
围成的区域(含边界)为
,当点
分别在
,
,
上时,
的最大值分别是
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e6d22012cf610b752b8ef7c6115685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0313e191529514224363f6eb3f1f734a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deebd2c36a5e644a566f1980091359bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e32039addb008103a2a8344225214a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8227797d13d5cc74c71581045a7924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b382704bc745bed935ca946515ee8c3.png)
A.![]() | B.4 | C.3 | D.![]() |
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4 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffde526ade778a7ce9d87c614726c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
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5 . 设直线
(
)与函数
和
的图像分别交于
,
两点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f4fd71111481e8c400e5796992d451.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46ac7c0896ef26ec4546649496d2acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/782dde986251dfb8c7547b5fb67161eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c2ba1516ca0ae1993b2cb3aaa93ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15520cf5be7c2685975aac51bc99ac4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f4fd71111481e8c400e5796992d451.png)
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6 . 对于每个确定的实数
,方程
表示一条直线,从中选出n条直线围成一个正n边形,记这个正n边形的面积是
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d512f1345272c742f1d7f8526c1fa53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6eb2fcf76cd58f6573a059ab1ab48b4.png)
A.![]() | B.![]() | C.4 | D.![]() |
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20-21高三上·上海浦东新·期中
名校
7 . 设
是直线
与椭圆
在第二象限内的交点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85726048da30d0fd18d9b5663fa47594.png)
___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9979465ce76b8582067703b39a0bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3a4102ccdac97ce1984b5d929a7653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af0127bac2803d37870edbcdac6214c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85726048da30d0fd18d9b5663fa47594.png)
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解题方法
8 . 平面直角坐标系中,已知点
,
,且
,当
时,点
无限趋近于点
,则点
的坐标是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c82d2584191977f8d9dcdcb1d13cd6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd34680847b9bb2501a3ff0f488d5e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29be3b3d5cba27d7734d20afc0bff79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d154b00d2363a51a93657d941f07ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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9 . 如图所示,一青蛙从点
开始依次水平向右和竖直向上跳动,其落点坐标依次是
.
表示青蛙从点
到点
所经过的路程.若点
要么落在
所表示的曲线上,要么落在
所表示的曲线上,并且
,试写出![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6eb2fcf76cd58f6573a059ab1ab48b4.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a13a293dfd9322ec872905f9d8146be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706234a6976bf98478d8a859d6aa04d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd377ba2f6424f7e4e1079fb6db0e46f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/333bf640fde8538fa8a7c0954b2e62b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6eb2fcf76cd58f6573a059ab1ab48b4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/3292c565-5079-4dc4-ba59-c086846c5ce7.png?resizew=244)
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10 .
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f4953b0f6306f1af4b54918c6e33d4.png)
A.0 | B.1 | C.![]() | D.不存在 |
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