名校
1 . 如图,OM,ON是两条海岸线,Q为海中一个小岛,A为海岸线OM上的一个码头.已知
,
,Q到海岸线OM,ON的距离分别为3 km,
km.现要在海岸线ON上再建一个码头,使得在水上旅游直线AB经过小岛Q.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572660084457472/1572660090683392/STEM/b0d8c5c250344947b5efae4081eaa58e.png)
(1)求水上旅游线AB的长;
(2)若小岛正北方向距离小岛6 km处的海中有一个圆形强水波P,从水波生成t h时的半径为
(a为大于零的常数).强水波开始生成时,一游轮以
km/h的速度自码头A开往码头B,问实数a在什么范围取值时,强水波不会波及游轮的航行.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6449e5045458b196b1af56b25d585b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db82973fe1165d3ab158599b553fbe4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ae5017d0f9e9f8f82f17c961da1b71.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572660084457472/1572660090683392/STEM/b0d8c5c250344947b5efae4081eaa58e.png)
(1)求水上旅游线AB的长;
(2)若小岛正北方向距离小岛6 km处的海中有一个圆形强水波P,从水波生成t h时的半径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73ba89133141567dd9e19ee90d9fd81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff92696e5d9cda77350d5ab75063cec.png)
您最近一年使用:0次
2016-12-04更新
|
817次组卷
|
2卷引用:2016届江苏省苏州大学高考考前指导卷1数学试卷
12-13高二上·吉林·期末
2 . 已知函数
.
(Ⅰ)求函数
的单调区间;
(Ⅱ)若函数
的图像在点
处的切线的倾斜角为
,问:
在什么范围取值时,对于任意的
,函数
在区间
上总存在极值?
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115741335552/STEM/d0b847a622394dd794eb090c5eba3bee.png)
(Ⅰ)求函数
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115741335552/STEM/c9a371738d31483d85059124faca7761.png)
(Ⅱ)若函数
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115741335552/STEM/e927fe807c50460ea71d797390589784.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115741335552/STEM/9ae9000222f841c3aade523001222585.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115741335552/STEM/3d5759c6a2c543d8a3f92d062838b4cd.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115741335552/STEM/19401ec014954515a41fb62b74a29539.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115741335552/STEM/1f947c2f1a9f45edb604c87a626c6349.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115741335552/STEM/fde07984e7b5468998ee3c7c3b8d00d8.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1572115735494656/1572115741335552/STEM/81122f6b162b4f7cb963d1bef1cbe022.png)
您最近一年使用:0次
12-13高二·全国·课后作业
3 . 下列说法正确的有
①回归方程适用于一切样本和总体.
②回归方程一般都有时间性.
③样本取值的范围会影响回归方程的适用范围.
④回归方程得到的预报值是预报变量的精确值.
①回归方程适用于一切样本和总体.
②回归方程一般都有时间性.
③样本取值的范围会影响回归方程的适用范围.
④回归方程得到的预报值是预报变量的精确值.
A.①② | B.②③ | C.③④ | D.①③ |
您最近一年使用:0次
2016-12-02更新
|
1066次组卷
|
3卷引用:2012年苏教版高中数学选修2-3 3.2回归分析练习卷
11-12高三上·福建·阶段练习
4 . 已知函数:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e18f72df2acd6f3e19fe6260617595f.png)
(1)讨论函数
的单调性;
(2)若函数
的图像在点
处的切线的倾斜角为
,问:
在什么范围取值时,函数
在区间
上总存在极值?
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e18f72df2acd6f3e19fe6260617595f.png)
(1)讨论函数
![](https://img.xkw.com/dksih/QBM/2011/12/14/1570612347838464/1570612353523712/STEM/d0fce710afa245ffa4e5129cecb215a8.png?resizew=34)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150e8e4ca6aa729a72a6a17c36b8ebfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f18507a11438684e4f6836a8e6021c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be3ad3dd6803d92df6ff8a80cd35095.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3434c372ecb36a447efb19744ab410.png)
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9-10高三下·北京东城·期中
5 . (
已知椭圆
,以原点为圆心,椭圆的短半轴为半径的圆与直线
相切.
(1)求椭圆C的方程;
(2)设
轴对称的任意两个不同的点,连结
交椭圆![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/4415d940d8904a9689cda1d42e7522a6.png)
于另一点
,证明:直线
与x轴相交于定点
;
(3)在(2)的条件下,过点
的直线与椭圆
交于
、
两点,求
的取值
范围.
已知椭圆
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/d317303a9cba459a8167a1bae5ebcd04.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/e66f218312e34cc9afd1768e36ef0ae1.png)
(1)求椭圆C的方程;
(2)设
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/54b2eef1aeff4bc685e7c0cc2d4fafa4.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/ff50b06d875243aa9c5fec5e4b82948c.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/4415d940d8904a9689cda1d42e7522a6.png)
于另一点
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/caf7547391e64ab4ba1a6b0f1d170ed3.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/a906fb03e42b4188abba78dc1072ff0d.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/eea432741420472ebfb45fae7d8c381d.png)
(3)在(2)的条件下,过点
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/eea432741420472ebfb45fae7d8c381d.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/4415d940d8904a9689cda1d42e7522a6.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/dfc1063fb8cd470a9d120b2c915ec9c7.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/b2d5c16639af4707b7212c764bd13816.png)
![](https://img.xkw.com/dksih/QBM/2011/3/8/1570028693577728/1570028699033600/STEM/ffebbda395f049cfb4fe73a8d4323ad6.png)
范围.
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解题方法
6 . 已知抛物线C:
,过点A(12,0)作直线
垂直
轴交抛物线于
两点,
于E,AE//OM,O为坐标原点.
(Ⅰ)求
的值;
(Ⅱ)若抛物线
上存在不同的两点G、H关于直线
对称,求
取值的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7f1b8df54cd7b0837ce89de920a474.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(Ⅱ)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
7 . 已知命题
对任意的
恒成立;命题
关于
的不等式
有实数解.若命题“
”为真命题,且“
”为假命题,求实数
的取值
范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba1abdab88496ca6775fbbcc5f155de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0be07495dbc744e1ecabac66f748218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451e12eab40cf38b8ffdf48e93e8a901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0045a603e555d2d2a8ef634f9edf9951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a31351c3868449fd115650c13152be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
范围.
您最近一年使用:0次
8 . 已知点
,
直线
过点
,且与线段
相交,则直线
的斜率的取值
范围是
![](https://img.xkw.com/dksih/QBM/2015/10/27/1572266719952896/1572266725662720/STEM/a6737c18fc3b4ebbbc6132c779541cb8.png)
![](https://img.xkw.com/dksih/QBM/2015/10/27/1572266719952896/1572266725662720/STEM/23dd9e73f3424be88eed1ca436425022.png)
![](https://img.xkw.com/dksih/QBM/2015/10/27/1572266719952896/1572266725662720/STEM/3421bbdbb426400a8d562006683d5594.png)
![](https://img.xkw.com/dksih/QBM/2015/10/27/1572266719952896/1572266725662720/STEM/459d54dae09b4931a2e31215f6dbf2c7.png)
![](https://img.xkw.com/dksih/QBM/2015/10/27/1572266719952896/1572266725662720/STEM/2b5b758951fd49c4b5dcca94d21aaaeb.png)
![](https://img.xkw.com/dksih/QBM/2015/10/27/1572266719952896/1572266725662720/STEM/3421bbdbb426400a8d562006683d5594.png)
![](https://img.xkw.com/dksih/QBM/2015/10/27/1572266719952896/1572266725662720/STEM/5aa6cf0985a048b5ac3ae42cf5018a26.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2016-12-03更新
|
876次组卷
|
2卷引用:2015-2016学年黑龙江大庆实验中学高二上学期开学考试理科数学试卷
9 . 已知定义域为
的函数
是奇函数.
(Ⅰ)求
的值;
(Ⅱ)判断函数
的单调性,并用定义证明;
(Ⅲ)若对任意的
,不等式
恒成立,求实数
的取值
范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21afcc89f07715d1a57c8ec232c9a2c.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(Ⅱ)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(Ⅲ)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071e8234503d8489e9ef32e5a73b0a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17565d36533a9aeeeb66d1ecd7ac7d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
范围.
您最近一年使用:0次
解题方法
10 . 已知函数
是定义在
上的增函数,则满足
的
取值
范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e1b05befa58e73163f3909b8f1660d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2bff65728e6d011a1ed5117600fa3e.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572445988380672/1572445994254336/STEM/bd2b4f05a1454df5ae7258d85dd0abfb.png)
范围是
A.(![]() ![]() | B.[![]() ![]() | C.(![]() ![]() | D.[![]() ![]() |
您最近一年使用:0次