已知平面向量
,
,
满足
,
,
,
,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7958a6bddd1d578bbd6fbcb92e3f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2396cac4b185cf1f1a67dad9248481c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9f1018e8e8edb2036fafb6a33124a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969c9862910e372f72b4683a767c09e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f98ea8233afea195e4228b4505a290d1.png)
2024高三·全国·专题练习 查看更多[1]
(已下线)重难点突破13 多元函数最值问题(十二大题型)
更新时间:2023-11-10 15:30:00
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【推荐1】
年,戴姆勒公司申请登记了“三叉星”做为奔驰轿车的标志,象征着陆上,水上和空中的机械化,而此圆环中的星形标志演变成今天的图案,沿用至今,并成为世界十大著名的商标之一(图一).已知
为
内一点,
,
,
的面积分别为
,
,
,则有
,我们称之为“奔驰定理”(图二).已知
的内角
的对边分别为
,且
,
为
内的一点且为内心.若
,则
的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc13ec3d0f68eadea079885ef44781f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173bc7a36757d77f01213411edd25241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319b6a5373bc8eb13772b8e6d047779.png)
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【推荐2】如图,
是等边三角形,
是等腰三角形,
交
于
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e1428974eecbbe213e7708ec2b4673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
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解题方法
【推荐1】已知矩形
,
,
,点
是
的中点,点
是对角线
上的动点,若
,则
的最小值是__________ ,
最大值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe48265b2127185b4ac5c6c348dc9bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f86481558a5806aa61be8394681a4b.png)
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【推荐3】在
中,
为中线
上的一个动点,若
,则
的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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【推荐1】若圆
上恰有四个点到直线
的距离为1,则实数
的取值范围是_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4896f254406ddfe0744b63f10724e76a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c6d3c99b7004603ba9ea9c341b8b3f.png)
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【推荐2】在平面直角坐标系xOy中,A,B是圆O:x2+y2=2上两个动点,且
,若A,B两点到直线l:3x+4y﹣10=0的距离分别为d1,d2,则d1+d2的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfe4da6f357e55927d25d9d27ea8717.png)
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