1 . 若
满足约束条件
,则
的最大值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c565aea9157d0672851f595fb6f9faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1995404eb114809bc18fbdb4f1388b2.png)
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解题方法
2 . 设数列
的前
项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918c880bc77c3e079171647a483ac9e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
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解题方法
3 . 设数列
的前
项和为
.已知
,
,
.
(1)求证:数列
是等比数列;
(2)若数列
满足
,且
的前
项和为
,求
.
![](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/315b41eeea0dbaa395af2474c4ba6acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b03dd47b0469396a7a7aeae1c31eb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)求证: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/7521a229c1860ab8311adc47d1658265.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/f26d8dd318fdd7ce26d6a8a54508cd03.png)
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4 . 已知
,
满足约束条件
若
恒成立,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7de5364a4b50a148c796359e3ef5b4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12aa223b23029ef84871fe451546d5c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
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解题方法
5 . 某算法的程序框图如图所示,若
,
,且
,
,
,则输出的结果是( )
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421473388109824/2422775689388032/STEM/b8be782f-0f0d-4632-bb59-45bf4db9ad9f.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66eba129d92ede31b728e2590c4db2a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73552080b72be89317eb60e9bef76c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93f55c7fdbe3a71ff84e5e192e6206e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f750ca0790311115e5322fdd7b2d0fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8675ee91d0a38e1654a55b09889edcf2.png)
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421473388109824/2422775689388032/STEM/b8be782f-0f0d-4632-bb59-45bf4db9ad9f.png?resizew=159)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 已知
中,角
、
、
所对的边分别是
、
、
,且
,
,当
时,
的周长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df6bb52902ef2cb7ba7ef1a681cdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b9446d7b31f0d6e044cf99deeb20aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2020-03-19更新
|
915次组卷
|
3卷引用:2018届湖北省荆州中学高三二模数学(文)试题
解题方法
7 . 已知数列{an}是等差数列,其前n项和为Sn,数列{bn}是正项等比数列,且满足a1=b1=2,3b3﹣S2=a6,a3+3b2=a7.
(1)求数列{an}和数列{bn}的通项公式;
(2)若数列
的前n项和为Tn,求Tn.
(1)求数列{an}和数列{bn}的通项公式;
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2767882820f4ba0defde0e412adb747f.png)
您最近一年使用:0次
8 . △ABC的内角A,B,C的对边分别为a,b,c,若cosC
,c
,△ABC的面积为
,则a+b的值为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c70c0c5a061195b9941796b6a9acc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92a0e7176a768155ecd6ec4f4607ee62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2668955c17cd930f29b3168245d2408.png)
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2020-03-17更新
|
349次组卷
|
2卷引用:2019届湖北省荆州市高三质检(Ⅲ)数学(文)试题
9 . 若x,y满足约束条件
,则z=x﹣2y的最大值为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aecd41d5d28636d4fa9e65dc515b567.png)
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名校
10 . 如图,在四边形
中,
,
,
,且
,
,
,
四点共圆.
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413215531057152/2413694817206272/STEM/db8b37d4bef04681865dc94217fb1f7a.png?resizew=199)
(1)求
的长;
(2)求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a9b6adb4dbff18763106f37fa71c92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a62bb8cfe72837b1a77851589000976.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413215531057152/2413694817206272/STEM/db8b37d4bef04681865dc94217fb1f7a.png?resizew=199)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2020-03-06更新
|
481次组卷
|
2卷引用:2018届湖北省荆州市沙市中学高三5月高考冲刺第一次模拟考试数学(文)试题