2011·江苏·二模
1 . 设a,b,c是单位向量,且a=b+c,则向量a,b的夹角等于________ .
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11-12高三上·安徽六安·期中
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解题方法
2 . 在矩形ABCD中,
,
,
为
的中点,若
为该矩形内(含边界)任意一点,则
的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7173b357dec0dca7d6da123345089741.png)
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2016-12-01更新
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7卷引用:北京四中2018届高三下学期第二次模拟文科数学试题
2011·福建厦门·一模
3 . 已知点
是
的中位线
上任意一点,且
,实数
,
满足
.设
,
,
,
的面积分别为
,
,
,
,记
,
,
.则
取最大值时,
的值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fc838e1477179b36ca7481ee2cc1e8.png)
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2011·江西吉安·三模
4 . .已知
,若
是以点O为直角顶点的等腰直角三角形,则
的面积为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27adcd07775083a1907e40fb50f4ca5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
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2011·江西·一模
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5 . 如图,设P、Q为△ABC内的两点,且
,
,则△ABP的面积与△ABQ的面积之比为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b77d22d883e952eb58710084f171e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1607d59de75a2d4cfd1491e59aadf97.png)
![](https://img.xkw.com/dksih/QBM/2011/4/11/1570115166052352/1570115171221504/STEM/3edb0de462b44d5d96d5ce448b5d77c1.png?resizew=186)
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2016-11-30更新
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3卷引用:2011届江西省八所重点中学高三联合考试数学文卷
6 . 在平面直角坐标系中,
为坐标原点,设向量
,
,若
且
,则点
所有可能的位置所构成的区域面积是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6b09a57f9ab7f825baa3f86a7c09f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854997a97edd901f7e9c5442bb423ee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d093706141016f4e2fde905738cd481e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4a0e938383cfae8fd96b5d8732e628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2016-11-30更新
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3卷引用:上海市七宝中学2023届高三上学期元月模拟数学试题