设点
在
所在平面内,若
,则
与
的面积比为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f452d678b6949f6acc0e6f45fec57a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f66a8aa1d735b9b2ac2d8a373a553a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
更新时间:2019-09-07 11:18:29
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【推荐1】已知点P为△ABC内的一点,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ebc6ae529a0ee4e6e058f58ae127094.png)
_____ .
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【推荐2】已知
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______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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填空题-双空题
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【推荐3】在
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,
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_________ ;
的值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a86e66f3705e9f6c9007a7e7f27bcdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5512e952889260d73f25e06078135fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510af5ecba1843e86bace1155a54adc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4c7fa4905fbbfe42fcbc60de6df9cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f9c2a14e820cd7b4c2e4f440244ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd1d0b6a8a215ab413aed44d4a1f2be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c3c54b8219d9d8834000e794f0546e.png)
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【推荐1】如图,平面四边形
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_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a503772d15eea69d1c8739c6b1c3fc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2f554699faf6ebf48d65bcfb5dc15d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56b596e35b42cd63d83a861dd9f586b8.png)
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填空题-单空题
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解题方法
【推荐2】向量集合
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是“凸集”,现有四个命题:
①集合
是“凸集”;
②集合
是“凸集;
③若
、
都是“凸集”,则
也一定是“凸集”;
④若
、
都是“凸集”,且交集非空,则
也是“凸集”;
⑤若集合
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一定不是“凸集”.
其中,所有正确的命题的序号是__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73b4fad12b6f4420bc320b11a278f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c1870a8601323a0fefb2f90c669f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe62a251f3d6dfb60ba2a42bdda534c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d86fcd178244fa8731df0ed6f981263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
①集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/214870cc10be3ab7bf66fae274517be4.png)
②集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8900d3ce5d983d0a19de9f65f987b5bf.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2646f41226f24960a6186dc7860ef45.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b76d26b78e63683dfacf10d3da6d74d.png)
⑤若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee035c6c34eef4268a150dab13117e9.png)
其中,所有正确的命题的序号是
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【推荐3】如图,点G为△ABC的重心,过点G的直线分别交直线AB,AC点D,E两点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2d6e4855329b54127b3924a17b49de.png)
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________ ;求
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2d6e4855329b54127b3924a17b49de.png)
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您最近一年使用:0次