1 . 已知数列满足
,
,若
,则
( )
A.9 | B.![]() | C.10 | D.![]() |
您最近一年使用:0次
2 . 已知数列
为等差数列,且
,则
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1058254faf78a383415111725525be7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9ba779ae126b3cad3185a4c54eedfd.png)
您最近一年使用:0次
3 . 已知双曲线
,在双曲线
的右支上存在不同于点
的两点
,
,记直线
的斜率分别为
,且
,
,
成等差数列.
(1)求
的取值范围;
(2)若
的面积为
(
为坐标原点),求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e92dd981e6ac024897dfac39557ab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1e95fb519f59c46f40e4ab44660073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ed47b8230bc383b2c167264f750d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595ba5dc88bf92a4d6a32b81ca103f03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
2023-06-17更新
|
864次组卷
|
4卷引用:山东省招远市第二中学2023-2024学年高二上学期期末模拟数学试题
山东省招远市第二中学2023-2024学年高二上学期期末模拟数学试题浙江省丽水市2022-2023学年高二上学期期末数学试题江苏省南京市第一中学2023届高三下学期高考适应性考试数学试题(已下线)每日一题 第20题 最值问题 减元降次(高二)
解题方法
4 . 已知数列
是递增的等差数列,
是公比为
的等比数列,
的前
项和为
,且
成等比数列,
,
成等差数列.
(1)求
,
的通项公式;
(2)若
,
的前
项和
.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8aa1eac6e38d75c7fe8ff7ee22f742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/716e1f8ecaf556761583455d407b5d4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa553cd1a9258efc973f7559bed4d447.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9221c0c92a526f65533cdc5400767af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c043f2696ac2b182708d9449a3a96c.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/0e6774733ce0f67d86e4a451c0072710.png)
您最近一年使用:0次
5 . 记
是数列
的前n项和,
,
.
(1)求数列
的通项公式;
(2)若
,
,
成等差数列,求
.
![](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/b2b78f55d69bb77e25aca85b5d56554c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0814eed359074e05bb576f3ae5f5db80.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71cdb539824e764a9d71d28e3181f42.png)
您最近一年使用:0次
名校
解题方法
6 . 已知等比数列
的公比
,且
,
是
,
的等差中项.
(1)求数列
的通项公式;
(2)已知数列
满足
求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d086903739de96e222c37625a2b15716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e475b58009937a2660442beecb0faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8390589ce6348644ac981dbed86efec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
您最近一年使用:0次
2023-05-18更新
|
405次组卷
|
3卷引用:山东省潍坊市2022-2023学年高二下学期期中数学试题
名校
解题方法
7 . 若等差数列
和
的前n项的和分别是
和
.且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f9cc3cae2dccfc3a4dc386806da62b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4863086901be9beea78c25d48ceb460.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
8 . 已知数列
是公比为q的等比数列,若
,且
是
与
的等差中项,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d591d9e65f02830c69c76bf9c25504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01317332a203c898536b1d0459f51d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8646b0fcb8aff8af6434b331f0eb27d.png)
A.![]() | B.3 | C.2 | D.1或2 |
您最近一年使用:0次
2023-05-05更新
|
516次组卷
|
2卷引用:山东省淄博市淄博实验中学2022-2023学年高二下学期期中数学试题
名校
9 . 设等差数列
的前n项和为
,且
,
.则
( )
![](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/faea9e43cc0d2cd9b461e48b9b8cc908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de3fb0eaaf10efe91aec427971e34ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa37e5661af68b263a3ed9030d4e9003.png)
A.29 | B.32 | C.35 | D.38 |
您最近一年使用:0次
10 . 若m,n是函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334ef69ed56313ac29b58b44a7e278e8.png)
的两个不同零点,且m,n,
这三个数可适当排序后成等差数列,也可适当排序后成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b603db6355be66287b5ee3478ef8d2.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334ef69ed56313ac29b58b44a7e278e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8bc8ee1d7c97ed4448c47d8899d5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b603db6355be66287b5ee3478ef8d2.png)
您最近一年使用:0次
2023-04-30更新
|
1031次组卷
|
3卷引用:山东省泰安市2023届高三二模数学试题