名校
1 . 已知两个非零单位向量
、
的夹角为
.
①不存在
,使
;
②
;
③
;
④
在
方向上的投影为
.
则上述结论正确的序号是________ (请将所有正确结论都填在横线上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8315ec34019d719771152be2252106e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
①不存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5349e9b4213d61cd12e3712b48255eab.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9500d1555649ea37556add6958a036f8.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36674c6255e79ac61ea24af954d4ce64.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8315ec34019d719771152be2252106e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
则上述结论正确的序号是
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2019-10-09更新
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852次组卷
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5卷引用:黑龙江省哈尔滨市第三中学校2020届高三上学期第二次调研考试数学(文)试题
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2 . 向量
,
满足
,
.若
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df42687a73cb92e92a3cb6e54f1edb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371ba95d0ac2642d0e112ea2430025f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5312c339e9b8524bc3094649b421f02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
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2020-11-02更新
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5卷引用:北京市西城区2019-2020学年高一下学期期末数学试题
2020高三·浙江·专题练习
3 . 已知单位向量
,平面向量
、
满足
,
,
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3cc805723d3ecc95b4472d13bb1bb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045bc6a74878300bb26098343d7c4641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5555d6634f8e0fe22b012ae8d419e0f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026015d4806054775ce5b31d8cf0f661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b023a599ea979d946808f4d1e7b15f5.png)
您最近一年使用:0次
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4 . 已知
都是非零向量,
,
,则
的夹角为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16219e7df999c4de751c9e31d6505546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05f1d68b133c5d2f76a06186e0ffb08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
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2020-05-20更新
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2卷引用:广东省珠海市第二中学2019-2020学年高一下学期开学考试数学试题
5 . 已知平面向量
,
满足
,
,则
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea246b2f31613dc432ca7ffa5c94c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6cb9852b26dffb6889db81b57481998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a560b8ff794c12dc8d194bcd2e3f3554.png)
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2019-04-04更新
|
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3卷引用:【市级联考】山东省济南市2019届高三3月模拟考试数学(文)试题
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解题方法
6 . 设平面向量
,
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7787902056794fd718bfeec12825522b.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d607667f2516c58bbdff03e01be50f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca6b0a927e3c160677f7604877819da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7787902056794fd718bfeec12825522b.png)
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2020-10-18更新
|
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3卷引用:2020届北京市西城区高三诊断性考试(二模)数学试题
名校
7 . 已知在Rt△ABC中,AC⊥BC,
,若B、C、D三点共线,则m+n=_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1732b682ca6a89dade07db3542df0c8c.png)
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2020-03-17更新
|
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3卷引用:2020届江苏省徐州一中高三上学期12月月考数学试题
8 . 过抛物线
的焦点且斜率为1的直线与
交于
两点,设
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc86ae3ec89df2e5780191976b0ad0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6368e466ea6a5726cb5b8cf60a6b3702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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9 . 已知
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d91adc5ec007f582356e380798e22d0.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a493172b29a43cf3c9334181c97bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105b693b33eac7f3e25c7ea331e38806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ae7f65d59b2a75d59d769c47ab81f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d91adc5ec007f582356e380798e22d0.png)
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10 . 在平行四边形
中,
,沿
将四边形折起成直二面角
,且
,则三棱锥
的外接球的表面积为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ceef47dfdbdb1b586806fa27271d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025c72d6107014e82fb6586ab15637a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
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2020-01-12更新
|
430次组卷
|
3卷引用:河北省石家庄二中2019-2020学年高三年级上学期12月月考理科数学试卷
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