如图,在同一个平面内,三个单位向量
,
,
满足条件:
与
的夹角为α,且tan α=7,
与
的夹角为45°.若
=m
+n
(m,n∈R),求m+n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b054db85bdb9866727e1008d2093f341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b054db85bdb9866727e1008d2093f341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b054db85bdb9866727e1008d2093f341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b054db85bdb9866727e1008d2093f341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://img.xkw.com/dksih/QBM/2021/8/30/2797334646980608/2810673634025472/STEM/5211bc79d45248edba61c357d579b307.png?resizew=101)
2022高三·全国·专题练习 查看更多[3]
(已下线)专题24平面向量的线性运算与坐标运算-2022年(新高考)数学高频考点+重点题型(已下线)第23讲 平面向量的基本定理及坐标表示(练) - 2022年高考数学一轮复习讲练测(课标全国版)(已下线)专题24 平面向量的线性运算与坐标运算
更新时间:2021-09-18 11:13:03
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,已知单位圆上有四点
,
,
,
,其中
,分别设
的面积为
和
.
(1)用
表示
和
;
(2)求
的最大值及取最大值时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813597f052c8930e12f0a22aeaa3cce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f8b5132f5657620c47c9ac7d5e31e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4960f79aae1f6716685ea6e8ff73b33d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63843baec8a52ef4e70d7872d493d07a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bfa314f141de4c1f73432c8cad4a841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42de297d4bb58a48223827b1c520f74c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42f39cdc758f215a5401119f292c2ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d8dc19a5c4ff0d14de4bf62716467f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】已知角
的终边上一点
,
.
(1)请用定义证明:
;
(2)已知函数
在区间
的最大值
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0527f3801a1f5fae326d9411555b7d.png)
(1)请用定义证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1ec2d7289bc848c59d03ef876073d6.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c48512814068f0781df94dabd78a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea7e406afac9609ca4015d25066af1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知向量
,
.
(1)若
,求
;
(2)若
,
①求
;
②已知
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a67711170219688d03144200ae396e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5de571daa349850dbc7fc98b7b990a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076559f08d17fb25e82886e791719e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44726b1d833cfef78c52b027817a69ce.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032f8f657f9163ebc64db95d214f4091.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d394016b9fecac73f38cbc4ff18dee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.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】如图,在平面四边形ABCD中,
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/4160a5c4-fca9-401a-bf53-4fef517421ba.png?resizew=147)
(1)若
,求
的值;
(2)求四边形ABCD面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b3d8e80dc2120d5d52f2897940e428.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/4160a5c4-fca9-401a-bf53-4fef517421ba.png?resizew=147)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d54d09ef825305de83671448a3dea21.png)
(2)求四边形ABCD面积的最大值.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】已知函数
的部分图象如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/28/18ca2ffb-4df7-4dc6-b125-878b1dfe6372.png?resizew=138)
(1)求
的解析式,并求
的单调递增区间;
(2)当
时,
,求
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5005cf5a19f960d9415fbf16c17341a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/28/18ca2ffb-4df7-4dc6-b125-878b1dfe6372.png?resizew=138)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65dc08f706c3f4f016db58dc239511f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a23ec821b5896710d79bfe703cec01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ba9745c01bcc7c3b62a4ee6dd60a3a.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】已知
的三个顶点坐标分别为
,求证:这个三角形重心G的坐标为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ecdeced16cc18797e2f343954177cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db034480062d8be8c22da981ba958b9e.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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7670da19e9644c866ef0ea4dbcebb132.png)
(1)求
;
(2)设
的夹角为θ,求cosθ的值;
(3)若向量
与
互相垂直,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7670da19e9644c866ef0ea4dbcebb132.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ecb6af2d602608a80170a8f1d0b13e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
(3)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80467aade72042974b1b2d1dbe5b3968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cfb755a80aa6c04d60627a54115d123.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】如图,在平面直角坐标系中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/74b2d653-6b13-4f10-98ce-494b60426e44.png?resizew=161)
(1)求点B,C的坐标;
(2)求证:四边形OABC为等腰梯形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fcc47bfcba4d30debec0bf1d620477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719b93a3a78cab66d5bf4a376631acce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d1aefe83700d40b0e821c973f83eb7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/74b2d653-6b13-4f10-98ce-494b60426e44.png?resizew=161)
(1)求点B,C的坐标;
(2)求证:四边形OABC为等腰梯形.
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
及
.
(1)当t为何值时,点P在x轴上?点P在y轴上?点P在第二象限?
(2)O,A,B,P四点能否构成平行四边形?若能,求出相应的t值;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df21035196f7d9ef924931471a14dca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d350e453f2cec6ec74efba6f8601b0.png)
(1)当t为何值时,点P在x轴上?点P在y轴上?点P在第二象限?
(2)O,A,B,P四点能否构成平行四边形?若能,求出相应的t值;若不能,请说明理由.
您最近一年使用:0次