解题方法
1 . 已知公差不为
的等差数列
满足
,
,
,
成等比数列.
(1)求
;
(2)若
,求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be32539bba8be177d5fa322a5feedaeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e84c30444f13d37ada78285dc4f83b7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f760005f9290dbb674fd1435bce0c571.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)
您最近一年使用:0次
2023-12-18更新
|
184次组卷
|
3卷引用:2015届黑龙江省大庆市高三第二次质量检测文科数学试卷
2015届黑龙江省大庆市高三第二次质量检测文科数学试卷人教A版(2019) 选修第二册 数学奇书 第四章 数列 4.3等比数列 4.3.2等比数列的前n项和公式 第2课时 等比数列前n项和的综合应用(已下线)4.3.2 等比数列的前n项和公式——课后作业(巩固版)
解题方法
2 . 已知集合
,则
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abe37012cfbd63e3fac8185f74efee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3 . 已知数列
的通项公式是
.记
为
在区间
内项的个数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c4c4fd237c66614fd15ffa172de084.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677e46ecd051c92489c0d1d458932f37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3dfd9ae2fce2ee6c81192d99c8bf8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c4c4fd237c66614fd15ffa172de084.png)
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4 . 已知函数
是定义在
上的奇函数,当
时,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6860fef1c0974c0c15a3ed2e43de8da4.png)
A.当![]() ![]() |
B.函数![]() |
C.![]() ![]() |
D.![]() ![]() |
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5 . 已知函数
为
的两个极值点,且
的最小值为
,直线
为
图象的一条对称轴,将
的图象向右平移
个单位长度后得到函数
的图象,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b24f70c59755d62e29da766e1168d39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6abf3f9b0ebcdc47a028c781b7edb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f8a63ddbca52039fa9ab44cda6b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9895bf4192f5c55c16f8270d53c49b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aeb076bad84890e24dbdc945ad543cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
A.![]() |
B.![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
2023-12-16更新
|
226次组卷
|
2卷引用:黑龙江省大庆市林甸县第一中学2024届高三上学期12月阶段考试数学试题
解题方法
6 .
为数列
的前
项和.已知
,
.
(1)求
的通项公式;
(2)设
,求数列
的前
项和为
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61cc942eaa2c2d9f47608ddfcdd716c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.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/3f90c342e24dd2af11c6ab820df7a549.png)
您最近一年使用:0次
7 . 如图1,某广场上放置了一些石凳供大家休息,这些石凳是由正方体截去八个一样的正三棱锥得到的,它的所有棱长均相同,如图2,设
,则平面
与平面
之间的距离是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ee01e28681b584f85c8875f053b77b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e3ffa7c33dc5ff17b4cce174b9b2ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/61f1f1af-cd8d-410d-a82b-e74adb6b241e.png?resizew=324)
您最近一年使用:0次
解题方法
8 . 函数
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf17bc14bca802858b413949fbaac3f.png)
您最近一年使用:0次
名校
9 . 已知平面向量
,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b3515de9a26c0397039e077f272b1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30eab8ca890e4438efb8bfe93529f114.png)
A.![]() |
B.若向量![]() ![]() ![]() |
C.与![]() ![]() |
D.![]() ![]() ![]() |
您最近一年使用:0次
2023-12-16更新
|
515次组卷
|
5卷引用:黑龙江省大庆市林甸县第一中学2024届高三上学期12月阶段考试数学试题
10 . 下列说法中不正确的是( )
A.底面是正多边形的棱锥是正棱锥 |
B.有两个平面互相平行,其余各面都是平行四边形的多面体是棱柱 |
C.棱台的上,下底面可以不相似,但侧棱长一定相等 |
D.圆锥的顶点与底面圆周上的任一点的连线都是母线 |
您最近一年使用:0次