名校
1 . 过平面直角坐标系中的点P(4-3a,
)(a∈R)作圆x2+y2=1的两条切线PA,PB,切点分别为A,B,则数量积
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ca0fcaa1c3130405d16a3b8737215f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438d94560a7ac74e8655e4c9184b9d5a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知不共线的平面向量
,
,
两两所成的角相等,且|
|=1,|
|=2,|
|=
,则|
|=______ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23bd18136e4e71e1e267bc9f8634b932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec82bd4e0fb7887e5999b8220f60b073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ecf646bc2e4cdd46fc5cc40d741dab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23bd18136e4e71e1e267bc9f8634b932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec82bd4e0fb7887e5999b8220f60b073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49029540336e2ae6efbe47f6dbfa0fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11b53e957bf1f2cfb96b7e397988014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ecf646bc2e4cdd46fc5cc40d741dab5.png)
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3 . 已知A(-2,4),B(3,-1),C(-3,-4),设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4cbaa13c53b09f9647d431f1371b34a.png)
(1)求
;
(2)求满足
的实数m,n;
(3)若线段AB的中点为M,线段BC的三等分点为N(点N靠近点B),求
与
夹角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4cbaa13c53b09f9647d431f1371b34a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbdbbbbc2bad9affb457feb678201f9.png)
(2)求满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3384ab89b8388e8fa088995c7a5a770.png)
(3)若线段AB的中点为M,线段BC的三等分点为N(点N靠近点B),求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d629200b2ad71705579061f2c0951d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebe66f8ecc219d2dd8e99d5618e3131.png)
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4 . 已知
是与单位向量
夹角为60°的任意向量,则函数
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5f087c8756c16365ee62c062159f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5f087c8756c16365ee62c062159f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12cf299ca1a7cc521e2668673d166bf7.png)
A.0 | B.![]() | C.![]() | D.![]() |
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5 . 若向量
,
满足|
|=1,|
|=2且
⊥
,则|
+
|=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ea10a57efb9cee06546ed8bf26a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc56f59971bd6f2fae7e76a91174d4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ea10a57efb9cee06546ed8bf26a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc56f59971bd6f2fae7e76a91174d4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ea10a57efb9cee06546ed8bf26a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc56f59971bd6f2fae7e76a91174d4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ea10a57efb9cee06546ed8bf26a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e236e47bcf69cd0b825bc1d111e170.png)
A.9 | B.![]() | C.3 | D.![]() |
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6 . 等腰梯形
中,已知
,
,
,点
,
分别在线段
和
上,且
,
,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c0ad79161fb29ec231dd0248623ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e921f46d90e43f4517c55832b6280f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d276c39029bfe05a2bae80adcfc2a95a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e6f6dab0308e58c0d268d7555623766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de70b417f01a0099f6d4c5511a7c77ae.png)
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7 . 两个向量
满足
,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/935fdfd91d6b8dc7a8573e06555acfc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206133ad634cca0294ab6643c4617423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d3b443940c1fb29d21bbb4cd661c97.png)
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8 . 向量
,
,对
,
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a043c2a92cb073dfe7a88f924cb9d89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb385a34be00668a4cd3159e6fddad75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1dd86a99a1f1ace7cd31ffcf8f285ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6be1171cb4cd59d14a26a508099466.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 零向量可以有很多方向,但却只有一个长度,就像我,可以有很多朋友,但却只有你一个值得守护!已知
,
,若
,则
与
的夹角为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deae5171eb718a10261d9b632aa7c2ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5198bffaa8d4504da459606cb9d27bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcb140aa73fbe827043dca511ea1335.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf5d6665fdc97227d3abee58a004e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f72b662a36c7f789a16052cb918241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deae5171eb718a10261d9b632aa7c2ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcb140aa73fbe827043dca511ea1335.png)
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10 . 若两单位向量
,
的夹角为60°,则
=2
,
=3
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc2c1c8436a4de274e3f20918b8376a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051f542f90afc6ff3d532907f4960080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ea10a57efb9cee06546ed8bf26a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b595e8557328e3a0e9bf833a134f186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc56f59971bd6f2fae7e76a91174d4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56b5052dbf1106bf917d14db054e625.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2018-07-05更新
|
358次组卷
|
3卷引用:【全国百强校】湖北省荆州中学2017-2018学年高一上学期期末考试数学(文)试题