已知平面内的三个向量
,
,
.
(1)求
的值;
(2)若
(
,
),求
的值;
(3)若向量
与向量
共线,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dde9cb3c2c078d44940f226ca200762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b8583acf0b89997429dbbaa837c3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dc9f82e788085e0bb47709afd53785.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab432c05aa7a81b1e95a072cb1febabe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dcc892622eecade579559c789253d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6612afffccf731637a818d5732e5ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
(3)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d5d06c8ba359e2f95bd6abbeb9d696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d5fa4100a6b6e8e2c3605c97e6ee78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
21-22高一下·辽宁·阶段练习 查看更多[3]
更新时间:2022-03-24 20:18:02
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相似题推荐
解答题-问答题
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解题方法
【推荐1】设两个不共线的向量
,若向量
,向量
,问是否存在这样的实数λ,μ,使向量
与向量
共线?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e1fe8b550eacb0134017d748155225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef02c1cf874108494c02820c5d23ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/624ee06f7bcab9039af4d40618b9c424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b4e518a498ab85e40ad5988478ca89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
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【推荐2】如图所示,O是正六边形ABCDEF的中心,且
=
,
=
,
=
.
(1)与
的长度相等、方向相反的向量有哪些?
(2)与
共线的向量有哪些?
(3)请一一列出与
,
,
.相等的向量.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20ec3efaa6b6ff5769e8999df5714a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/5e0c3e72-d7bc-4ad1-8481-ab575690a3fe.png?resizew=135)
(1)与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
(2)与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
(3)请一一列出与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
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【推荐1】在平面直角坐标系中,已知向量
,
.
(1)求
;
(2)若
,
,
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479779070b95c1c2845f0a24dc8d5f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18515948143068d8d652f349508e478.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a78549d537a52e66b20495242afb0d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be0541baf4ae69b438ac7af92c9ca22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59cefcb34912e3842a41f7a17e27a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ee59964f020fc52b5ba66a3f5fcc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】在直角坐标平面内,已知向量
, 点
和
满足:
且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e25188de9f8274027fe2b695062ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ec837945e0a11127fbdb9574bec43a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1c8fa49bbe4b4cab4ed8d05b112ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1106e319dd25f560d80960cf457d048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436e160ec1f59125328cf7113dba4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3677f2a2a1b4aef3a370a03db832366.png)
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【推荐1】设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bb466b254cd75ea50094d1611e4b0c.png)
(1)若
,求实数
的值;
(2)求
在
方向上的正射影的数量.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bb466b254cd75ea50094d1611e4b0c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8bfac5917305b020a33b91d6f83e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
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【推荐2】(1)已知平面向量
,
,若
与
平行,求实数
的值.
(2)已知复数
是方程
的解,若
,且
(
、
,
为虚数单位),求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f4dcf415977dea53f52a85b6b82136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6298f5ea480c1db659fad4d4c658da47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3143307ad0ba4a631eac04e814993655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)已知复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc0d4d254ff83c9298b1eecb3b4c831c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807472b86889a79c4b0dc376c3edd5d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b6ec89b956b2b79bcdf1d4aae8def0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff0f1b6dd0be54207299f6c22eec25f.png)
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解题方法
【推荐1】如图,在平面直角坐标系中,点
,
,锐角
的终边与单位O交于点P,
![](https://img.xkw.com/dksih/QBM/2021/5/6/2715179882020864/2771202237030400/STEM/f831a6a8e2b7462fa1ad51b1fd77b7d7.png?resizew=171)
(1)用角
的三角函数表示点P的坐标;
(2)当
时,求
的值;
(3)在x轴上是否存在定点M,使得
恒成立?若存在,求出点M的横坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e193e00a5d2b4654735c1f850d9dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3bdf215e094e894f651c129b89be326.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/2021/5/6/2715179882020864/2771202237030400/STEM/f831a6a8e2b7462fa1ad51b1fd77b7d7.png?resizew=171)
(1)用角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa372cbb53d30765d5b1c8dc916d7550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)在x轴上是否存在定点M,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e2ff53f5c31a9f098a022d7f2f4d03.png)
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【推荐3】设
,且
,
.试用向量方法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9772003f78fac21a2287e11befbb26ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d480f0fe759b6773d568ea7bcd2f19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a396c0edb4770c3e31d6e6630bff16.png)
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