1 . 如图,在
中,
,
,点
在
的延长线上,点
是边
上的一点,且存在非零实数
,使
.
(Ⅰ)求
与
的数量积;
(Ⅱ)求
与
的数量积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d74864273da89d4c7771a244753ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5fc7f92372b1b3e47072dfc0a616a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b3a15ae9730962af0718c982541b85.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe35c91649a5bea2518387a2b36e0c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b62ea9f2ffb1342d9edc22e9649cad.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b96bdf51785d5d15292d6a194881ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbba7bff7720b3aa33f29936ede7819e.png)
![](https://img.xkw.com/dksih/QBM/2018/2/7/1877211848851456/1879495060717568/STEM/decbacf5e4ce42f48dc7109503e168a4.png?resizew=245)
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2 . 在平面直角坐标系中,O为坐标原点,A,B,C三点满足
.
(1)求证:A,B,C三点共线;
(2)求
的值;
(3)已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6823f66e23b037fa84d0eefa84670b98.png)
的最小值为
,求实数
的值.
![](https://img.xkw.com/dksih/QBM/2016/6/2/1572689449050112/1572689455276032/STEM/98439d10e1b84296b83b5bcbdde0da45.png)
(1)求证:A,B,C三点共线;
(2)求
![](https://img.xkw.com/dksih/QBM/2016/6/2/1572689449050112/1572689455276032/STEM/d52510b21d5546aaa2ec5597279a170e.png)
(3)已知
![](https://img.xkw.com/dksih/QBM/2016/6/2/1572689449050112/1572689455276032/STEM/7280c15b87f84e5cabafb74a54a69759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6823f66e23b037fa84d0eefa84670b98.png)
的最小值为
![](https://img.xkw.com/dksih/QBM/2016/6/2/1572689449050112/1572689455276032/STEM/afe80ba5c6fa41daa7b11d84bacb3a06.png)
![](https://img.xkw.com/dksih/QBM/2016/6/2/1572689449050112/1572689455276032/STEM/41cfd1b40a094a0c8f8fa2778508ab92.png)
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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)
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2016-12-03更新
|
2169次组卷
|
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
11-12高二上·江西·期末
4 . 动点
的轨迹
的方程为
,过焦点
的直线
与
相交于
,
两点,
为坐标原点.(1)求
的值;
(2)设
,当三角形
的面积
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658aa70a197c830aa765f2f7ea4c86c5.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/832ca3f8e3f271f86141aa14969f2fc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ec213b81475f38a9bee5edb9669197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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