名校
1 . 数列
中,
,则此数列最大项的值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85fc9b7b0bb1fac909fde7bce40d476c.png)
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名校
解题方法
2 . 已知
是各项均为正数的无穷数列,其前
项和为
,且
.给出下列四个结论:
①
;
②
;
③对任意的
,都有
;
④存在常数
,使得对任意的
,都有
,
其中所有正确结论的序号是______ .
![](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/a519c34b3220007c58f56b8190dfcd1b.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d59c6d9991a45e22d257cc8f23c64e4.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199d9f93ae241a3f470ebe4f8264e36c.png)
③对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25531b417aa51e1237a96e6fc061633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93f39dd7fbd497b8d3daeaff48376ec.png)
④存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6bf90a1bbeea09e1b7206975a99f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1505d56f0b35fe7f2de1fe1888036e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75fee6645fff7fb0c2b2d40f4ddb727.png)
其中所有正确结论的序号是
您最近一年使用:0次
2022-11-04更新
|
1323次组卷
|
5卷引用:北京市朝阳区2023届高三上学期期中质量检测数学试题
名校
3 . 设数列
的前
项和为
,
,
.给出下列四个结论:
①
是递增数列; ②
都不是等差数列;
③当
时,
是
中的最小项; ④当
时,
.
其中所有正确结论的序号是____________ .
![](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/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe309f340976a2eb676a3e7eb05a154.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772bbf90e0f049e3d8281a014bda5e87.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500d68f2678989a5ce7431cfd51b019d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab617790d6afa32d002e19a36ea7e12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e246dc281a49c7387b3c096def47922.png)
其中所有正确结论的序号是
您最近一年使用:0次
2022-11-02更新
|
739次组卷
|
3卷引用:北京市大兴区2023届高三上学期期中检测数学试题
4 . 数列
中,如果存在
,使得“
且
”成立(其中
,
),则称
为
的一个峰值.若
,则
的峰值为___________ ;若
,且
不存在峰值,则实数
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065054f4e163585d630aa42cb6323a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be1b24995778b8d9bd9721959abae47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce35679ae2a5ee13428c64f3ebbabec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01a9c4d14740671afdabf9933e0a972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f06722d5a1c570703b037fcaa6e65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065054f4e163585d630aa42cb6323a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40211fb5c3ca947e970f21aff51ddc9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065054f4e163585d630aa42cb6323a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5e70a381c58f6871e4687c0fbf9c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065054f4e163585d630aa42cb6323a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08075b3b73dd2609baad69a496fdd9a8.png)
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名校
解题方法
5 . 已知数列{
}满足
,且
.则数列
的最大项为第___________ 项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b52db91099c697202aec780a0189e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352d9b76dcf639368fa68cae70149802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f43ac89dc93935199174da85cc257b.png)
您最近一年使用:0次
6 . 数列
是公比为
的等比数列,
为其前
项和. 已知
,
, 给出下列四个结论:
①
;
②若存在
使得
的乘积最大,则
的一个可能值是
;
③若存在
使得
的乘积最大,则
的一个可能值是
;
④若存在
使得
的乘积最小,则
的值只能是
.
其中所有正确结论的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e15be6eb86b5f1746b0036a87c9ca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84360a23d7b8b002f1bd0bbd5bb89ddb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7cdb918c433522c051918c31048eb6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411641715d7f5132c34f1d6eace8cd8b.png)
②若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4df741ebbb5266817ee436fe7f978f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
③若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4df741ebbb5266817ee436fe7f978f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
④若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4df741ebbb5266817ee436fe7f978f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
其中所有正确结论的序号是
您最近一年使用:0次
2022-05-06更新
|
603次组卷
|
2卷引用:北京延庆区2022届高三下学期质量监测数学试题
名校
解题方法
7 . 设函数
,
,
(
,n≥2).设数列
的前n项和
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658f421181d9b3eae6063aa92707f557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afc1dd528d62c84b130fbcdf1e58050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1033e64a509e56aa51174e145a026671.png)
您最近一年使用:0次