名校
解题方法
1 . 已知各项均为正数的等比数列
满足
,若存在两项
、
使得
,且使得
有解,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fdcaf78e41a30864cfe42ebce79301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa45f845bc583ac93363ae117d591fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6b21ae7a7dffdcb9dafb816d5c641f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() ![]() | B.![]() | C.![]() ![]() | D.![]() |
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2 . 已知等比数列
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf093e5d54c8725f0377fcdf153a0bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38715233ecb60ddec966f6b327e1e332.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 一船自西向东匀速航行,上午
时到达一座灯塔
的南偏西
距塔
的
处,下午
时到达这座灯塔的东南方向的
处,则这只船的航行速度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c12aeebfa1af16f325c98a43bb08c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838ebf89610203842e10db05a9dc005e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 数列
首项
,且
,令
,则数列
的前
项和
( )
![](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/0f0abbc453bbe66c0ee6cc56ae23f12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94e22de952e2b63bb9a750a77200d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
5 . 已知
、
、
是
的三内角,且
,则此三角形的形状为( )
![](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/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf377477ed3c778e90718f380893bf9.png)
A.锐角三角形 | B.直角三角形 | C.等腰三角形 | D.等边三角形 |
您最近一年使用:0次
名校
解题方法
6 . 已知
、
为非零实数,且
,则下列不等式成立的是( )
![](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/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
7 . 在
中,若
,且
.
(1)求角
的大小;
(2)求
周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5338d6be14c7c3f28ce30be8e1c1db8.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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名校
解题方法
8 . 已知函数
.
(1)解关于
的不等式
;
(2)若对任意的
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e53b41a402af793c7d071791756c804.png)
(1)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85e3779916b8a87cdbaefa8b3736fb7e.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66ef59c3970f3581a5ea29e21fd564d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-02-16更新
|
510次组卷
|
2卷引用:重庆市松树桥中学2018-2019学年高一下学期期中数学试题
名校
解题方法
9 . 已知下列命题:
①不等式
的解集为:
或
;
②不等式
的解集为:
;
③不等式
的解集为:
;
④若不等式
对任意
都成立,则
;
⑤若
,则函数
,
的最小值为
.正确的有_____________ .(将你认为正确的命题的序号填在横线上)
①不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d22a3d395ff99792f7c0bd45c496456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da648ee55d60eb76c56cd747c30d40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890d6dafa253b76e17c37f607ad29a53.png)
②不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f48d0fd32d220f682b97d769356d4bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc4eddd3a646184eecda1f72c3e759e.png)
③不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ae40c77edce0e73d808541da23d071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf76b4073ae6950540bad28b4a77846.png)
④若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88696bdb9875349efeafd249731bc2fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43976a38904f9103b86e51a255783465.png)
⑤若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a90f71a22daa4df7bd75c1e3e66fcb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7857ff8e98ca88a6e2520d43787ee2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a33b12b3e29154e6615d4136e943045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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名校
解题方法
10 . 在等差数列
中,
为它的前
项和,若
,
,
,则当
最大时,
的值为__________ .
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb15e818ed3399e6acfb390f4805b743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f0853863ab2c68e6393b1049aa7fe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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