名校
1 . 已知
,
,
,则
与
夹角的度数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fb441b1aef7942c6caebe7a58de5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fa8ea29001bb1f0c1e5157aff2fca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ba996f653018f51802b36617c0923b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
您最近一年使用:0次
2016-12-03更新
|
719次组卷
|
3卷引用:2014-2015学年广东省揭阳一中高二上学期期末考试文科数学试卷
2 . 已知O是△ABC所在平面上一点,且
+2
+3
=
,则△OBC和△ABC的面积比为_________
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572118019211264/1572118025109504/STEM/3c9f00d25c554019bc3cb47e8903550d.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572118019211264/1572118025109504/STEM/9e27f6775ee64a5b85fc31ccf08f9c7f.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572118019211264/1572118025109504/STEM/3a52e5f10d4e4477be06b0de0a5fcf73.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572118019211264/1572118025109504/STEM/90a68d5ef58244288998605f5a613e12.png?resizew=10)
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3 . 已知向量
为平面向量,若
与
的夹角为
,
与
的夹角为
,则![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/74f435c6f6e541d38826425ea6551849.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/827fca3d374543d6844020ca8abfafad.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/181683c9ffaf4e8cbd0abdf3d428e2fa.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/b1738746545f49cc905bb047971d07ee.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/124413f37622406c9effc9541335d55d.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/181683c9ffaf4e8cbd0abdf3d428e2fa.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/28dc18d02dad434cbde2dcd5c2451b6b.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/6dca055adea64adc952f6194a2ed7b12.png)
![](https://img.xkw.com/dksih/QBM/2016/10/13/1573068666142720/1573068672172032/STEM/74f435c6f6e541d38826425ea6551849.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 在长方体ABCD﹣A1B1C1D1中,
=
![](https://img.xkw.com/dksih/QBM/2016/3/18/1572546232901632/1572546238734336/STEM/6e8d76e740d04b2cb9c7d909dbab5a93.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知平面向量
,且
⊥
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e1c5a9b887ea0b03651a0be466e0096.png)
___ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7812d20bcc9571f800e626fb719f13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e1c5a9b887ea0b03651a0be466e0096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
您最近一年使用:0次
2016-12-03更新
|
215次组卷
|
4卷引用:2014-2015学年浙江省嵊州市高二下期末检测理科数学A卷
6 . 在
中,已知
,
,点
在边
上,且
,用
,
表示
,则![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/732eadbac92047c9bf2cd85ead2f2a8b.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/98bdd0183f1c442880894f0227393d62.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/9e6b61ff26604846afe23784a775f663.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/663c70a9401f459caa99622d4f923340.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/00eb8b7b0af64530bee7b11dec5bfb8f.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/b6756a1b55084ebd919f5f25f4a5c4e3.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/ad846214cb7047bc9b8332a4136d35db.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/59e4422c1de445d6b07d148e7927b63e.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/424a13838f3c4e0885a6108a33888bff.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/eeb88c1cf9154462992e6dc456f165a5.png)
![](https://img.xkw.com/dksih/QBM/2016/9/9/1573011054977024/1573011060236288/STEM/732eadbac92047c9bf2cd85ead2f2a8b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7 . 已知
为非零向量,且
,
,则下列命题正确的个数为
(1)若
,则
(2)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10cc91793018e8fd26a5563241b7fbcc.png)
(3)若
,则
(4)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebec0993fbba934d2dc94395e97d6c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5acbfff5ef665af535405c8b396a13d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf0bdaa23cd8716c82f4dfd74990dc9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c5fe7951a50c370e780f96e0c0099a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10cc91793018e8fd26a5563241b7fbcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f964eecc8ef698005a08c45e3e659c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f964eecc8ef698005a08c45e3e659c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10cc91793018e8fd26a5563241b7fbcc.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebec0993fbba934d2dc94395e97d6c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414c4b7cbf90e2447c829e2feb24d8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414c4b7cbf90e2447c829e2feb24d8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebec0993fbba934d2dc94395e97d6c73.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2015-11-27更新
|
191次组卷
|
4卷引用:2014-2015学年浙江省嵊州市高二下期末检测理科数学A卷
8 . 已知向量
,且
,若实数
满足不等式
,则实数
的取值范围为
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021498925056/1573021504692224/STEM/3e6e4d000852488a817bfd3a5cc1de76.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573021498925056/1573021504692224/STEM/7c9d9219470441bfbf95d83bf50226a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f03b5ef91658d6702fdb89775264c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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16-17高二上·陕西西安·期末
9 . 在直角坐标系xOy中,点P到两点(0,﹣
),(0,
)的距离之和等于4,设点P的轨迹为C,直线y=kx+1与C交于A,B两点.
(1)写出C的方程;
(2)若
⊥
,求k的值.
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560025853952/1572560031219712/STEM/c4560da274664a14a998251490b8c03d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560025853952/1572560031219712/STEM/c4560da274664a14a998251490b8c03d.png)
(1)写出C的方程;
(2)若
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560025853952/1572560031219712/STEM/9590f9642a9c42ec88fa4aba9b8a0a2e.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560025853952/1572560031219712/STEM/152706d50d994ee08248044be4ff98e0.png)
您最近一年使用:0次
10 . 已知向量
=(1,1,0),
=(﹣1,0,2)且k
+
与2
﹣
互相垂直,则k的值是
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/2091ca1c9c604c2d902c75c82e4179c6.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/7820e57fb0414345ad7512debbe11f30.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/28db5c088b9b4c478b62fc31ce9d3b44.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/cc6ba9b8b37843649769aa4c65614d76.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/28db5c088b9b4c478b62fc31ce9d3b44.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/cc6ba9b8b37843649769aa4c65614d76.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
209次组卷
|
4卷引用:2015-2016学年宁夏银川市育才中学高二上学期期末理科数学试卷