1 . 已知在数列
中,
,前
项和
.
(1)求
、
;
(2)求数列
的通项公式;
(3)设数列
的前
项和为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c010cb8d0922083fb27442d09f15cb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b78e4a03d4595f14be42054b61dfc6.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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解题方法
2 . 已知等比数列
有
项,
,所有奇数项的和为85,所有偶数项的和为42,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2def5aa62f497709e1bd8258583d62fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
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解题方法
3 . 已知数列
为等差数列,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67bb9405b5d575f38602e4036ef6f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9f1f763c066c916bae475f51e63026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
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解题方法
4 . 已知随机变量
的分布列如表:
若
,离散型随机变量
满足
,求:
(1)
的值;
(2)
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![]() | 0 | 1 | 2 |
![]() | 0.4 | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8441349d50ccee714d5d7f796a12f028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af87266d442c1a981bf9b1b3f0bac2c0.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1cb238aef93ba4dff76b8c56ac092c.png)
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5 . 某校为了提倡素质教育,丰富学生们的课外生活,分别成立绘画、象棋和篮球等三个兴趣小组.现由甲、乙、丙、丁、戊五名同学报名参加,每人仅参加一个兴趣小组,每个兴趣小组至少有一个人报名,则不同的报名方法有( )
A.72 | B.100 | C.240 | D.150 |
您最近一年使用:0次
6 . 已知双曲线
的右焦点为
,若
关于渐近线
的对称点
恰好落在渐近线
上,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be92f0e0012a7696c78e3e00513edefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac89d45e79b10741d93a9443c70adde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92febb64725497dd891a525e6f998e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48019a2f1fb1c67b794a50ed576f1fd8.png)
A.![]() | B.2 | C.3 | D.![]() |
您最近一年使用:0次
2024-04-04更新
|
481次组卷
|
3卷引用:内蒙古自治区呼和浩特市剑桥中学2023-2024学年高二下学期第一次(3月)月考数学试题
2024高二上·全国·专题练习
解题方法
7 . 在数列
中,
,
,则通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15fd4b4529139b37e63d15ab26664aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
名校
8 . 下面四个结论正确的是( )
A.空间向量![]() ![]() ![]() ![]() |
B.若对平面中任意一点![]() ![]() ![]() ![]() ![]() |
C.已知![]() ![]() ![]() |
D.任意向量![]() ![]() |
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2024-02-10更新
|
125次组卷
|
2卷引用:内蒙古自治区呼和浩特市剑桥中学2023-2024学年高二下学期第一次(3月)月考数学试题
解题方法
9 . 数列
的前
项和为
,已知
,则下列说法正确的是( )
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa4db05fc9272ce8500a102890fceaf.png)
A.![]() | B.![]() |
C.当![]() ![]() | D.当![]() ![]() ![]() |
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2024-01-26更新
|
639次组卷
|
4卷引用:内蒙古呼和浩特市回民区2023-2024学年高二下学期期中考试数学试题
内蒙古呼和浩特市回民区2023-2024学年高二下学期期中考试数学试题广西壮族自治区玉林市2023-2024学年高二上学期1月期末数学试题(已下线)第五章:数列(单元测试)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第三册)四川省成都市简阳实验学校2023-2024学年高二下学期3月月考数学试题
名校
解题方法
10 . 已知函数
.
(1)若
,求不等式
的解集;
(2)若
,
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eab3f5d6aa528be872297e170d8398c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb1bbd495bb6477a9115925a994996f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8693ba02ea9b5dd2612ffc5307682b.png)
您最近一年使用:0次