名校
解题方法
1 . 双曲线
的左、右焦点分别为点
,斜率为正的渐近线为
,过点
作直线
的垂线,垂足为点
,交双曲线于点
,设点
是双曲线
上任意一点,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027194ee457f8d2e7dfd7d6795841b5e.png)
A.双曲线![]() ![]() |
B.双曲线![]() ![]() |
C.当点![]() ![]() ![]() |
D.点![]() ![]() |
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2 . 在△ABC中,角A,B,C所对的边长分别为a,b,c,已知sinA,sinB,sinC成等比数列,且c=2a,则cosB的值为
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知函数
(
)的部分图象如图所示,
,则 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d3984548c2bae2f157c3c9b3812fea.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572358815129600/1572358820405248/STEM/1d164367-b38c-4d0d-a5be-a7e7fa55a908.png?resizew=324)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d423aa61bc55e5950b3f9016b1514a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fcc95cd12c89f7c83b56f89d7ad0257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefae762de1ea984f593c2fdc0dcdffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d3984548c2bae2f157c3c9b3812fea.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572358815129600/1572358820405248/STEM/1d164367-b38c-4d0d-a5be-a7e7fa55a908.png?resizew=324)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 已知函数
,若将其图象向右平移
个单位后所得的图象关于原点对称,则
的最小值为
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572504846286848/1572504852094976/STEM/6f57147158fa40e4b1f0f1a19ba46c5d.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572504846286848/1572504852094976/STEM/9868f5627331483c86caf57c694ba47a.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572504846286848/1572504852094976/STEM/c064805b9f4d488992d2ea2ac73e2539.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知
,
,且函数
.
(1)设方程
在
内有两个零点
,
,求
的值;
(2)若把函数
的图象向左平移
个单位,再向上平移2个单位,得函数
图像,求函数
在
上的单调增区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb15f1f892ab9eddda34f63e03aeda84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bd129276864a5574c71ff032f66973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f005ce53021b2481e58be0fbc89d8216.png)
(1)设方程
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/87ca356e674c4d8085d3b0225193b619.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/ae927b0e8c27489a921d2c2985efcb91.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/46d92f3d887640ffa3a597351c50c347.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/8520f590d81c47fa8eee777b69e7968a.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/95198a7bd47142f088d2eab85449da01.png)
(2)若把函数
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/4a2745aa39b44e86a835513a48943fa8.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/d6e9719b4d8e4c0daa6be33d3c2a5353.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/0c1fa429160f4e309e13f828a4b65101.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/0c1fa429160f4e309e13f828a4b65101.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572418914410496/1572418920390656/STEM/44441c950b7548edb73d6a0852ca3ecb.png)
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名校
解题方法
6 . 已知
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f06a002a861a5a11be6842fd075a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c1f914da4657eca7865982b130b299.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
7 . 已知
的内角A、B、C所对的边长分别为a、b、c,且满足
.请回答下列问题:
(1)证明:
为等腰三角形;
(2)若
的外接圆直径为1,试求
周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720137bea4ca2abe1f49c45d63fa6a33.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34eba9ca4d15ff02c23c9e7a9d035362.png)
.
(Ⅰ)求
的单调递增区间;
(Ⅱ)在锐角三角形ABC中,a,b,c分别是角A,B,C的对边,若
,
,
的面积为
,求b的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34eba9ca4d15ff02c23c9e7a9d035362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41a85b52d149033fa86da61b74146b8.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)在锐角三角形ABC中,a,b,c分别是角A,B,C的对边,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360b25bb26627cd568977ee81d97fe36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
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9 . 函数
的最小正周期T为_______ .
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493558308864/1572493564264448/STEM/b585c8947d114f6ea7747a51e8af8592.png?resizew=148)
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