1 . 已知一个等差数列前三项为
则这个等差数列的前10项的和是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13eeb6acdc7802da60e27f1d1c988487.png)
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2 . 已知两个等差数列2,6,10,…,202和2,8,14,…,200,将这两个等差数列的公共项按从小到大的顺序组成一个新数列,则这个新数列的各项之和为______ .
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3 . 某区域的地形大致如图
,某部门负责该区域的安全警戒,在哨位
的正上方安装探照灯对警戒区域进行探查扫描.假设
:警戒区域为空旷的扇环形平地
;假设
:视探照灯为点
,且距离地面
米;假设
:探照灯
照射在地面上的光斑是椭圆.当探照灯
以某一俯角从
侧扫描到
侧时,记为一次扫描,此过程中照射在地面上的光斑形成一个扇环
由此,通过调整
的俯角,逐次扫描形成扇环
、
、
.第一次扫描时,光斑的长轴为
,
米,此时在探照灯
处测得点
的俯角为
如图
记
,经测量知
米,且
是公差约为
米的等差数列,则至少需要经过______ 次扫描,才能将整个警戒区域扫描完毕.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ac241a6a76fe5ef9e0c47b91022561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3bb90d13cc04869fc775a0d6968191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227611549779ca023b28babcef9923d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1a80ebe854959e85f8fbdb77407bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a328e1537d7aba18bc124a9eec1664d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5d209fc21986b1a4052080df3d8ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd366786b7de3ade35b1885491ba1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/362e8af456b90ac6d7d540bef266eea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d3fddd78e7614c5e2169f109d7b0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a73681e29e5e4efa73194283da483f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a1fe314207f01f626ecec0a457030c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
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4 . 某钢材公司积压了部分圆钢,经清理知共有2024根,每根圆钢的直径为10厘米.现将它们堆放在一起.若堆成纵断面为等腰梯形(如图每一层的根数比上一层根数多1根),且为考虑安全隐患,堆放高度不得高于
米,若堆放占用场地面积最小,则最下层圆钢根数为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
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5 . 设等比数列
的公比为
,则“
,
,
成等差数列”的一个充分非必要条件是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba0c5e13b2a855de99c171b45bd5730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec161579eb8772cc0238cfee7b3a9c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86e2e42b4aa93db9241103e7f61766c.png)
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6 . 判断下列命题,把正确的命题序号写在横线上:__________ .
(1)实数2,8的等比中项为4;
(2)若
为等差数列且前n项和为
,则
是等差数列;
(3)已知数列
前n项和
,则
为等比数列;
(4)已知
为等比数列,则数列
是等比数列(其中
);
(5)若数列
满足
,则数列
为等差数列.
(1)实数2,8的等比中项为4;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
(3)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e1f70fb9ac4b3c7f04e18c673eca5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(4)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/181778bd8a2503690e92bd09a61af75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f306d2b261f4c39a9fc0858d96e647.png)
(5)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7266459b6116ed35d57cc8fa54df8282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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名校
解题方法
7 . 等差数列
的公差
,其前
项和为
,若
,则
中,不同的数值有______ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c98aaba1203b133a3b019d6102e367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80707ef40916b8401f2eccd36a0e9ecd.png)
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8 . 在数列
中,已知
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd5367f5c88db960f534311d3476ef5.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7582fa4b33a70fc0b9682b0aee60271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd5367f5c88db960f534311d3476ef5.png)
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23-24高三下·上海·开学考试
解题方法
9 . 在等差数列
中,若
和
是方程
的两个根,则数列
的前22项的和
等于 __ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1e1834076ee35b5c587a5184eb7aab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1bafe813850f6151b6950c93bfd5d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236cff762d0d5fc2653e85cb4c189887.png)
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名校
解题方法
10 . 已知数列
是等比数列,且
.设
,数列
的前n项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf14ebc775db2414a5a960badca8960.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794e305187cc0ca7c94ba37d09afb282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf14ebc775db2414a5a960badca8960.png)
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2024-02-28更新
|
1223次组卷
|
4卷引用:上海市育才中学2024届高三下学期第一次调研(3月)数学试题