解题方法
1 . 网上创业成为越来越多大学生的就业选择.李红大学毕业后在网上经营了一家化妆品店,计划销售A,B两种品牌化妆品.据市场调研,销售A品牌化妆品第一年的利润为3.8万元,预计以后每年利润比上一年增加0.5万元;销售B品牌化妆品第一年的利润为4万元,预计以后每年利润的增长率为8%.设
,
分别为销售A,B两种品牌的化妆品第n年的利润(单位:万元).
(1)试比较销售A,B两种品牌化妆品前10年总利润的大小;
(2)问:第几年销售A品牌化妆品较销售B品牌化妆品在同一年的利润差
最大?
参考数据:
,
,
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(1)试比较销售A,B两种品牌化妆品前10年总利润的大小;
(2)问:第几年销售A品牌化妆品较销售B品牌化妆品在同一年的利润差
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831de7531e4b51f836a5ef44c4791198.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12c1b112ec5c7351af799b882aad19f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae943281ac93473201694f259d1a575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77cf72760edaed82004c63b8081c77fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ba432ea05d38b435a999851772a652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8077d0ea77d88d4550e620768cae9bf4.png)
您最近一年使用:0次
解题方法
2 . 已知正项等比数列
,其前
项和为
,且满足
,
,
,
成等差数列.
(1)求数列
的通项公式;
(2)若数列
满足:对任意正整数
,
均成立,求数列
的最大项的值.
![](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/4ccdc17b603871d20843ffccca2df0ae.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/a6d5791e7e0bd54d6433c1a4e1fecb7e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](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/44e02a73dab685f44bcfb7e79779b395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
2023高二上·江苏·专题练习
3 . 已知数列
的通项公式
(
),试判断该数列的增减性,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5382596ffd7ebe9dda5650eedc7cd8d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
您最近一年使用:0次
4 . 已知椭圆
:
过点
,且
的离心率为
.
(1)求椭圆
的方程;
(2)设点
,
,
是椭圆上关于
轴对称的两点,
交椭圆
于另一点
,
是椭圆的左焦点,求
的内切圆半径的取值范围;
(3)若斜率为
的直线与椭圆
相交于
,
两点,且
中点
恰在抛物线
:
上.记
的横坐标为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56ab70e602f2e2e291df643ab209162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee65ea60792c6c4aad98ce15d05756f.png)
(3)若斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f437b25c78ffd3a63817ca1938eca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b35985d5c22a637a518fa1e87f1d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
您最近一年使用:0次
解题方法
5 . 已知
是公差为
的等差数列,它的前
项和为
,
,数列
中,
.
(1)求公差
的值;
(2)若
,求数列
中的最大项和最小项的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.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/ca6f2bf93d53773db93c06cb48e2925f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b00e0725b1c19a5a5feca48ea6bbb5f.png)
(1)求公差
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d16ac820badf6347201aafd705f207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
名校
解题方法
6 . 已知数列
的各项都是正数,
为
的前
项和,且对任意
都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b68ee656a8061c5a627bb7d8d722b6.png)
(1)求数列
的通项公式;
(2)若
,
,证明:
中有且仅有一项在
中.
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b68ee656a8061c5a627bb7d8d722b6.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf08b677b992d23f0d8cf7fd97afbd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bac2c132edd7fc16060846e93e2bf81e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
您最近一年使用:0次
解题方法
7 . 已知
为数列
的前n项和,且满足
,
.
(1)求
的值;
(2)若
,记数列
的前n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/2815b24f5a89be7ae53aed93182e8988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c413489426cf19a7968681b1e8c2e6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255376b627a6c2347136d3dbf7738988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762022cd7c3133845e5f6c5cbb6c536c.png)
您最近一年使用:0次
2023-08-13更新
|
617次组卷
|
2卷引用:河北省邢台市质检联盟2023-2024学年高二上学期第三次月考(11月)数学试题
8 . 已知数列
满足
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed8835310e62c3b17c579dae642cb166.png)
(1)求证:数列
为等差数列;
(2)求数列
的通项公式与最大值.
![](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/ed8835310e62c3b17c579dae642cb166.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35440ebc1b87cbf08fe96c083c5bcc88.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
您最近一年使用:0次
2024-01-02更新
|
1529次组卷
|
5卷引用:河南省九师联盟洛阳强基联盟2023-2024学年高二上学期12月联考数学试题
解题方法
9 . 已知数列
满足
.
(1)求数列
的通项公式;
(2)探究数列
是否存在最大项,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993e7db8ff89d70387c950bd0e2096ad.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)探究数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
2023-12-27更新
|
307次组卷
|
3卷引用:河南省青桐鸣2023-2024学年高二上学期12月联考数学试题
名校
解题方法
10 .
为数列{
}的前
项和.已知
>0,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5c23ae59e5bbcb970a35365e08d841.png)
.
(1)求数列
的通项公式;
(2)设
是首项为1,公比为3的等比数列,
①求数列
的前
项和
;
②若不等式
对一切
恒成立,求实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5c23ae59e5bbcb970a35365e08d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5abfc0544c942f0775114331547b03.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a6c852d593cb9f6bdfd9eeddb50fa3.png)
①求数列
![](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)
②若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce70396e9a9c2268109b4acb3a23045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次