名校
1 . 如图,在正方形
中,
分别为
的中点,求证:
(利用向量证明).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
![](https://img.xkw.com/dksih/QBM/2017/3/7/1638695154688000/1644407990149120/STEM/b57ecf0b82934abe834a695cfd971481.png?resizew=131)
您最近一年使用:0次
2017-03-15更新
|
1584次组卷
|
4卷引用:2015-2016学年河北省石家庄市辛集中学高一下学期综合练习(一)数学试卷
2 . 设向量
,
,
,则实数
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7ee2f0d3dae10e56bd5113ec232501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d691bf7be11cbeac6115c734a81e598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6433f98b702100f5fba0844361be7051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.1 | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
3 .
是
所在平面内一点,
,
为
中点,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4419fff81359d6d199e627a5c6e47232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac9d2738ecac9c76f5e53e2c1ab7a3c.png)
A.![]() | B.![]() | C.1 | D.2 |
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名校
4 . 已知向量
与向量
平行,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77caf5dad9b85493b3ddb39b3e81df98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6575461aebc31bc4a13364be90266254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9e31d4524a63074fdac37088160bd9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
351次组卷
|
5卷引用:2016-2017学年河北正定中学高二上月考一数学(理)试卷
5 . 已知向量
,
,
满足
,
,若
,则
的最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f68ec80700f61df0f77c1ed2b61207d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/944dc9101dfd6019c31110823c94fd71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f07a67b671b6e1b6f1781c10748c2a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab432c05aa7a81b1e95a072cb1febabe.png)
您最近一年使用:0次
2016-12-04更新
|
855次组卷
|
3卷引用:2016届河北省石家庄市届高三下学期质量检测二理科数学试卷
6 . 已知
是圆
上的动点,
在
轴上的射影为
,点
满足
,当
在圆
上运动时,点
形成的轨迹为曲线
.
(1)求曲线
的方程;
(2)经过点
的直线
与曲线
相交于点
,并且
,求直线
的方程.
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/f5ee68c637d34bd3851221301a1af8f2.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/2bd416afae664843a4bdc06578fde5bc.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/f5ee68c637d34bd3851221301a1af8f2.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/4f61d551af564e5c804c47a3d3ffadc6.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/1f3855d2cd11469d98818fc1762b8213.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/0307ce0811d5484cb673bd05ebef475b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/96916b7082c8474a82ccce5c2828a3d4.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/f5ee68c637d34bd3851221301a1af8f2.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/d224cf2f5c904f259f8e9659cd9a4216.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/0307ce0811d5484cb673bd05ebef475b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/278b21898fb34a1096da033c674d93f9.png)
(1)求曲线
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/278b21898fb34a1096da033c674d93f9.png)
(2)经过点
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/633ee10ac6384c759a3f86b9463eaec2.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/eed26cb18ca24431bc5b30208b7dc779.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/278b21898fb34a1096da033c674d93f9.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/f86a4a53f13a4da79fd3d81d8121571b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/45a2c0a57f0b4dc6a2a7e21c613a89f6.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856168960/STEM/eed26cb18ca24431bc5b30208b7dc779.png)
您最近一年使用:0次
7 . 已知向量
,则
的值为
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572470388686848/1572470394191872/STEM/3ac4a55296284346a0581c4c6d63ed95.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572470388686848/1572470394191872/STEM/0cb9c4e1ea5a4f0da0a2f2cbb9cb7422.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
8 . 如图,已知圆心角为
的扇形的
长为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
![](https://img.xkw.com/dksih/QBM/2015/12/22/1572376178130944/1572376183832576/STEM/6a68d84afaf1458a95bee15f36547f12.png?resizew=152)
您最近一年使用:0次
9 . 已知圆
及定点
,点
是圆
上的动点,点
在
上,点
在
上,且满足
,
.则动点
的轨迹
的方程为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec04c978353ff631468ed0ad6b5cfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d7ed28093de7fa4708c9dcbe1417a7.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c16229da71495b5f2ca3f280a1fdb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1598aa821cb278f26167e01fb0b8d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2016-12-03更新
|
381次组卷
|
3卷引用:2015-2016学年河北省石家庄一中高二上学期期中数学试卷
10 . 已知
中,点
是
的中点,过点
的直线分别交直线
于
两点,若
,
,则
的最小值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://img.xkw.com/dksih/QBM/2015/7/14/1572179366748160/1572179372408832/STEM/cc6946b298f347c2aef2ab3d33f6a24f.png)
![](https://img.xkw.com/dksih/QBM/2015/7/14/1572179366748160/1572179372408832/STEM/2114ebce2fdc427b979c28d56ac12019.png)
![](https://img.xkw.com/dksih/QBM/2015/7/14/1572179366748160/1572179372408832/STEM/cc6946b298f347c2aef2ab3d33f6a24f.png)
![](https://img.xkw.com/dksih/QBM/2015/7/14/1572179366748160/1572179372408832/STEM/dc11eb6e770d478999acb05ec38252b7.png)
![](https://img.xkw.com/dksih/QBM/2015/7/14/1572179366748160/1572179372408832/STEM/426b9d821b65486f8847f088d7161cb3.png)
![](https://img.xkw.com/dksih/QBM/2015/7/14/1572179366748160/1572179372408832/STEM/395e52b6e2a6445281b9a3fb83138087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/805a169a92348515733263fd1a696d31.png)
![](https://img.xkw.com/dksih/QBM/2015/7/14/1572179366748160/1572179372408832/STEM/7786badd3586491091cc8c487c865d6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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