1 . 设点O为
的内部,点D,E分别为边AC,BC的中点,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ca79c7a791bada364af903f686889a.png)
_________ .
![](https://img.xkw.com/dksih/QBM/2016/2/22/1572489983975424/1572489989767168/STEM/f7e090937da74c838c068eb15c094768.png?resizew=45)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de2365c1d7b3fb3fb5523d782d9fd4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ca79c7a791bada364af903f686889a.png)
您最近一年使用:0次
2016-12-04更新
|
2221次组卷
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3卷引用:江西省上饶市上饶县中学2017-2018学年高一下学期期末考试数学(理)试题
14-15高三上·福建福州·阶段练习
2 . 设
是平面上一定点,A、B、C是平面上不共线的三点, 动点P满足
,
,则动点P的轨迹一定通过△ABC的
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778427904/STEM/43bb79067f914a82887cff4938d8cd55.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778427904/STEM/f6936c3befb84f6e8f15c41e33541341.png)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572317773103104/1572317778427904/STEM/e18a6b5178ac4fc189fd72d0a6730a32.png)
A.外心 | B.内心 | C.重心 | D.垂心 |
您最近一年使用:0次
名校
3 . 设向量
,
,其中
,
,
为实数.
(1)若
,求
的最小值;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/470955e0ba462ec27e4ecf289d0e26af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b6222f2dff66ce212acaf92119af3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acaaff6f066b088455b1c8610650fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602d32c271f3c70a3cff9ad6422c69b7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9412f10b1db89bd924ad7beadc83331b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706e9acb62e73fac4c23fdbbd8a41a0d.png)
您最近一年使用:0次
2016-12-03更新
|
2169次组卷
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5卷引用:江西省宜春市樟树中学2017-2018学年高一下学期第三次月考数学(理)试题
真题
名校
4 . 在平面直角坐标系
中,已知向量
点
满足
.曲线
,区域
.若
为两段分离的曲线,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe90c6530490158d8f817f06b41f7bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f6791d977f41a2d7b324bd05b23aba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a26e4632a9247d282ad2af8291c98d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20ab800c1b323708fdb2ac47e4a1f84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1689dec977b7da900c124a31b3cd285.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2016-12-03更新
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4694次组卷
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8卷引用:2015-2016学年江西省南昌二中高二上第三次理科数学试卷