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1 . 已知等比数列
的前n项和为
,若
,则公比![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
_______ .
![](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/23203f65ffafdbb35670cc923dddea35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
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2 . 如图所示,直线
是曲线
在
处的切线,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cf7e10997b59645866f7889669e29b0.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cf7e10997b59645866f7889669e29b0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/9a19e5aa-574c-4de6-afec-a48f77aaeba1.png?resizew=167)
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3 . 设
是定义在R上的奇函数
,当
时,有
恒成立,则不等式
的解集是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec65a2bec3d4296c613a80b3ae41d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3347a337fa48a0ca315fd72d751123c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
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2020高三·全国·专题练习
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解题方法
4 . 已知正项等比数列
的前
项和为
,且
,则
的最小值为___
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/58cd2251ab55b9c7e81d7f017ebe77cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16bac4081e998f87e4b151fdc8e24f0.png)
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2020-08-17更新
|
2089次组卷
|
4卷引用:吉林省延边第一中学2022-2023学年高二下学期开学考试数学试题
吉林省延边第一中学2022-2023学年高二下学期开学考试数学试题河南省济源市第一中学2022-2023学年高二下学期开学实验班数学试题(已下线)考点19 等比数列(讲解)-2021年高考数学复习一轮复习笔记安徽师范大学附属中学2021届高三下学期5月最后一卷理科数学试题
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5 . 已知
,设复数
.若复数
为纯虚数,实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf6e396e8b74eb0b6bc3b098c1f32c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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6 . 下列四个结论中,错误的序号是___________ .①以直角坐标系中
轴的正半轴为极轴的极坐标系中,曲线C的方程为
,若曲线C上总存在两个点到原点的距离为
,则实数
的取值范围是
;②在残差图中,残差点比较均匀地落在水平带状区域中,说明选用的模型比较合适,这样的带状区域宽度越宽,说明模型拟合精度越高;③设随机变量
,若
,则
;④已知
为满足
能被9整除的正数
的最小值,则
的展开式中,系数最大的项为第6项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d537816f957a48b82d5252248c1e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b61e788a7fb6fcdd3bcdb67ea77180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b6e0e9cee827525415075233b8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc421f5e9f93a18a20b10ccfad57bfd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5018cd18ac04ffa1917e41abc108c31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6adbfad8cd006cbe8be20af659fb17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b05b21195ee04bc22f9e0a3d20b12a.png)
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7 . 将5本不同的书分给4人,每人至少1本,不同的分法种数有_______ .(用数字作答)
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2019-09-13更新
|
991次组卷
|
3卷引用:吉林省延边市第二中学2020届高三入学考试数学(理)试题
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8 . 已知
且
)在
上是增函数,则实数
取值范围是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658a7d7e3e6156a412a0a3b48243ef0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7242b2ab643f9470da77e29d043b893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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