1 . 已知
,向量
的夹角为120°,且
,则实数t的值为
![](https://img.xkw.com/dksih/QBM/2015/7/16/1572184568242176/1572184573648896/STEM/a2e07a0d4dce479c89e5046579a7e7c0.png)
![](https://img.xkw.com/dksih/QBM/2015/7/16/1572184568242176/1572184573648896/STEM/565f2c96b48a444897b42476237f546b.png)
![](https://img.xkw.com/dksih/QBM/2015/7/16/1572184568242176/1572184573648896/STEM/a9d198f3af2049bc82d0e5f8dda32f25.png)
A.-2 | B.-1 | C.1 | D.2 |
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2 . 已知向量
满足
,且
,则
与
的夹角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69613bda5b1face9751a8c13ae757ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f836d905839bfafd9a4131b4eb18ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb185c1a3fb3abe9088ed5250ad554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b5960e052f614ae45628785cb2cbf4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知向量
,其中
.若
,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1480455aa64339501108863afb42bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c7ba98a91f8d890daedca91e3cc778c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52863d1cc7814ce0130845af778fbaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd31dc2d0967db352574381d66d33fc0.png)
A.2 | B.![]() | C.![]() | D.![]() |
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4 . 已知
为正三角形
内一点,且满足
,若
的面积与
的面积之比为3,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1572839291756544/1572839297933312/STEM/133ac5c40e11438fad328d09bfd73163.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8189f7b0ffe4d20bf0fad43b4ed589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddaefacc47c655a9109654bbe2e6bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
您最近一年使用:0次
2019-01-30更新
|
282次组卷
|
2卷引用:2015-2016学年河北省定州中学高二6月月考数学试卷
5 . 已知
的夹角为
,则![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468370423808/1572468376084480/STEM/135a83cb87ea452dbe00f0041a52886c.png?resizew=61)
_______ .
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468370423808/1572468376084480/STEM/a9be3b588b544625aff8f782f80a4bb4.png?resizew=113)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468370423808/1572468376084480/STEM/cd49cd25e2e64fa393405d7e921c6062.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468370423808/1572468376084480/STEM/135a83cb87ea452dbe00f0041a52886c.png?resizew=61)
您最近一年使用:0次
6 . 已知向量
,向量
,若
,则实数
的值是
![](https://img.xkw.com/dksih/QBM/2016/10/12/1573065188335616/1573065194168320/STEM/3d1097b700f9429295d5e8b61f5fb8f6.png)
![](https://img.xkw.com/dksih/QBM/2016/10/12/1573065188335616/1573065194168320/STEM/515c44eedb924474b2862d2ecd21872e.png)
![](https://img.xkw.com/dksih/QBM/2016/10/12/1573065188335616/1573065194168320/STEM/6224f99d900c4126b41745b2a2b8d24a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.-2 | B.-3 | C.![]() | D.3 |
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7 . 已知空间四边形ABCD,F为BC的中点,E为AD的中点,若
=λ(
+
),则λ=
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/614cf0730ed24e52b74add4a05ef63ae.png)
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/ccafea807181423590572910aa0bcf56.png)
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/d50cef3e94a34bcb9817d6c31f62092b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/52211717b7b546478dd59f2080b5d598.png)
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499426279424/1572499431636992/STEM/614cf0730ed24e52b74add4a05ef63ae.png)
A.![]() | B.![]() | C.1 | D.![]() |
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8 . 在空间平移△ABC到△A1B1C1(使△A1B1C1与△ABC不共面),连接对应顶点,设
=
,
=
,
=
,M是BC1的中点,N是B1C1的中点,用基底{
,
,
}表示向量
的结果是________________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d0ed5745ba16ce0dd9c04e90352411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b680f91c4a693cc9ab2c23f2e9114ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524594bf0942ed86f56fc1eee120a81a.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/524594bf0942ed86f56fc1eee120a81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54cc992e1c797b9232b826239eb32525.png)
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9 . 如图,空间四边形
中,
,
分别是
,
的中点,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b0c4c783dd55685bd3e88bb31c6696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9c827e46d1a395fafbf15cdd6c6c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c783bab7586f60dc14d4f10b6d5b12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588a2119bc5e8cdf4731828b195a7892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a44be92f38e063a01b8cd67418815cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0b7d7cd1209595cb3e39831ddc6f77.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10 . 如图,在
中,
为边
上的中线,
,设
,若
,则
的值为
![](https://img.xkw.com/dksih/QBM/2016/6/23/1572798513299456/1572798519164928/STEM/4b5c1b39db5b47898bc3f4917a6cd423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a852b67c7955cdc0b1be13ff3e0a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a313474ad50c0e7ae1b33fe867b45da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c44fb8bd689d2ba4c7db1c2db39aaf66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fffd330dd6b9241659d790bd2a7fb2.png)
![](https://img.xkw.com/dksih/QBM/2016/6/23/1572798513299456/1572798519164928/STEM/4b5c1b39db5b47898bc3f4917a6cd423.png)
A.![]() | B.![]() | C.![]() | D.2 |
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