名校
1 . 如图,B是
的中点,
,P是平行四边形
内(含边界)的一点,且
,则下列结论正确的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/b9ed814c-29b9-44d1-ad56-8a7035723f60.png?resizew=136)
①当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb16286c770441db5fdf073a3e75076.png)
②当P是线段
的中点时,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b4a3649c987967b99bca05e2318cab.png)
③若
为定值1,则在平面直角坐标系中,点P的轨迹是一条线段
④
的最大值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc36ebfd2da243ecb2a9cc5eeb32ab3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8e40522513cfc7df0ec216d6f5c6a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/b9ed814c-29b9-44d1-ad56-8a7035723f60.png?resizew=136)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb16286c770441db5fdf073a3e75076.png)
②当P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c98a7f3a8bf384b1dfc1d34aebd46d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b4a3649c987967b99bca05e2318cab.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059d6df06a5b85848dc4fa33327f8e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
A.1 | B.2 | C.3 | D.4 |
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解题方法
2 . 设向量
,
,若
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5e3ef4102047232b85b26b6bb33e04a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf82d2ec5aca23073990355764667e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70facc9bc02af0867d248407bd317c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
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3 . 如图所示,在梯形
中,
,
,
,
,E是
的中点,点P在以A为圆心,
为半径的四分之一圆弧
上运动,若
,
,则
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633bf2de732ae51fc06ef3d559915da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f667fffffa4e2b782b01392e0d2d682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a900d0b93f73490e7efc2e444bb016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722ee137b010e07c170427f43a7ea1be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/9fabdec5-4a92-4dd1-91ba-d05801cf434f.png?resizew=143)
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解题方法
4 . 在
中,
,
,
,D为边
的中点,M为中线
的中点.
(1)求中线
的长;
(2)求
与
的夹角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb15541fa53381c9130217ccac69f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(1)求中线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb3a156336d41abd8a7256c592cc83a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228f4ddbb8959f904d71259be7c6ab36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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4卷引用:江西师范大学附属中学2020-2021学年度高一上学期期末考试数学试题
5 . 已知向量
,
,若
,则m=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97815a26fbc7c9e77d6f4065877d8dcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ed0533e277afd0ff7a4bc51f70c6ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391c98a888108f96b49811e06fb28307.png)
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6 . 已知
,
,
,且
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bdfc750fe0ace842a461e89f2b7b290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcfce809e35760212e25a2acb43e62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e8f9def040fc34d79e9a7ddf2f2c30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9b9d7207235de748517185aa1ab6f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2045796149a4d8a4e57b0d428aa68744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3874cfb92230922f405524750c7c61e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 如图,在
中,
,
,
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2021/2/3/2649941701378048/2650908411027456/STEM/e276309a-54e2-464f-8a50-7e985ca50fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db4890cd6b12a71aed8545616eb9d27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7799c8c0c8160b5db539ec147ded8c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc603ed06b61fa3bca49e878600d91b6.png)
![](https://img.xkw.com/dksih/QBM/2021/2/3/2649941701378048/2650908411027456/STEM/e276309a-54e2-464f-8a50-7e985ca50fb1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
8 . 已知平面向量
,
且
与
共线.
(1)求
的值;
(2)
与
垂直,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6de1979a45f0a7c49f11e3d7ef3b585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e422066159f0b0520d934b9b707ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d28588cd48a18ecfaa26f84464c578.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785f5c64bcb26f5d26d2bb55d4c4d472.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0067ea61ac2abd75b17f906c13fd6879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1c1dd6b13d92f2cc2eef097e14c07c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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9 . 已知等边三角形
的边长为6,点
满足
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925425ba47d596cfdf835509de804b56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e712585656aaad176e50a6952c4377c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 如图,延长正方形ABCD的边CD至点E,使得DE= CD,动点P从点A出发,沿正方形的边按逆时针方向运动一周后回到点A,若
,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8379522a85d8daacac23915a184fa9.png)
A.满足λ+μ=2的点P必为BC的中点 |
B.满足λ+μ=1的点P有且只有一个 |
C.满足λ+μ=3的点P有且只有一个 |
D.λ+μ=![]() |
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