在
中,已知
,
,
在线段
上,且
,
是边
(含端点)上动点;
![](https://img.xkw.com/dksih/QBM/2020/8/10/2525075589595136/2527806378901504/STEM/a3535fc2-27d3-4ee8-a9d2-a5c064fb6b6f.png)
(1)用向量
,
表示
;
(2)若存在点
使得向量
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2a8bfb3ca33ddec22644e9683cfb43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2020/8/10/2525075589595136/2527806378901504/STEM/a3535fc2-27d3-4ee8-a9d2-a5c064fb6b6f.png)
(1)用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b680f91c4a693cc9ab2c23f2e9114ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1395fa3420959a18d91b324adc622116.png)
(2)若存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4e1443883b85bf1731a820287345db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cb63aeea0b37799404c8fec092b21d.png)
更新时间:2020-08-14 19:38:09
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知函数
.
(1)当
时,求函数f(x)的单调区间;
(2)当
,函数f(x)在[-3,3]的最小值记为g(a),求g(a)的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952f4106ce716d3307dd14b1e09065d0.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a671406a5442a3088a4ee1d064114a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】若
,不等式
恒成立,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4cf16e39bff4aa2d482c90411d5ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9bd06dbb60db9ef56db0d694505330.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
分别是矩形
的边
和
的中点,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/7f16f0e7-d2ed-4307-85d0-b7b95939a3ed.png?resizew=183)
(1)若
,求:
的值;
(2)设
,试用
表示
;
(3)若
,
是线段
上的一动点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/7f16f0e7-d2ed-4307-85d0-b7b95939a3ed.png?resizew=183)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a468672a7acc80b40561724c3c7975f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c477184b1e9104bac22743ae1817231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fa2fcefaf3d8868da0cb52877c5247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436b63e793d6d39990341d29cf47f10.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9639896487e6cf18e8fd02d2a7ed2087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7ca0b1b361e8669118d5c990646234.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知点G为
的重心,过G作直线与AB、AC两边分别交于M、N两点,且
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9545f42dc3bb78dabdb73891f2e4a69c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301af152850e2c795bd385d0d10836f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f0b84ee4ed90face0993d4f4dda379.png)
您最近一年使用:0次
解答题
|
适中
(0.65)
【推荐2】如图,在△ABC中,E为边AC的中点,试问在边AC上是否存在一点D,使得
?若存在,说明点D的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6398991ca03f4b8307ad7e43181c864f.png)
![](https://img.xkw.com/dksih/QBM/2018/2/21/1886989816922112/1887332191346688/STEM/abc5dbff35f640e185d59e42b158d82d.png?resizew=96)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】如图所示,在边长为2的等边△ABC中,点M,N分别在边AC,AB上,且M为边AC的中点,设
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977278207942656/2978403252985856/STEM/27180af1-ff82-4bab-9b6f-c15729d27504.png?resizew=151)
(1)若
,用
,
表示
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfca12290a98993f84d7ee4b8caaa9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7ae4dd35c90a6da3c7f604ea0861af.png)
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977278207942656/2978403252985856/STEM/27180af1-ff82-4bab-9b6f-c15729d27504.png?resizew=151)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6abd9c737f9dee785a13d23b58bb9a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb93bee3008094ff1faf0dc99eba9318.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8155cdb33ab3817286369a8cf3b1cbcf.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】已知
是两个非零向量,当
的模取最小值时.
(1)求
的值;
(2)求证:
与
垂直.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306103fdeaedd9b7f92d360895bb219a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc20644e220b5abd6ca29a666760dfe.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】在
中,内角
所对的边分别为
,且
.
(1)求
;
(2)若
,连接
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7c66142d6e376d691d67e4a769b8a24.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3cca3d17c5cdd6baa3a60723397e7c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa12efe16e6c4ef0ec08a078ecbb5a2.png)
您最近一年使用:0次