已知平面向量
满足
,
,且
.
(1)求
在
方向上的投影向量;
(2)若
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9883f16cdef5fb87fb9d6a9897d113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404067afb19bd74f447a6c0c832af1da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec2d4fc004e4bf82085e0c1b6e283fa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd880815001ddbe3a0722ad8821252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
22-23高一下·安徽宣城·期末 查看更多[3]
安徽省宣城市2022-2023学年高一下学期期末调研测试数学试卷山东省青岛第十五中学2023-2024学年高二上学期期初考试数学试题(已下线)8.1.1-8.1.2 向量数量积的概念、向量数量积的运算律-【帮课堂】(人教B版2019必修第三册)
更新时间:2023-07-28 06:43:34
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【推荐1】已知
.
(1)求
;
(2)当
为何值时,
与
垂直?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f04817cc538e7e5aa82eca19f7029b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b195aa36a3c2753ebf08cb464c52ad1e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0d6f45010a54e0bfa0b48c90376ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83c5803cc8c05849028a57c4bd4ee72.png)
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【推荐2】已知两个不共线的向量
的夹角为
,且
为正实数.
(1)若
与
垂直,求
在
上的投影;
(2)若
,求
的最小值及对应的
的值,并指出此时向量
与
的位置关系.
(3)若
为锐角,对于正实数
,关于
的方程
有两个不同的正实数解,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb45d79ed37ed115c473f52c60d02a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74206063e86df3bbd8bd035722470aa2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4ad35dcb553c18a2ac000b2af134ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218106d875f7cb77ba5ebcc866b5de33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2150cb0060a14e88e93c33cf456ae832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515b1e449cde902a74977b1fc3b31100.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1f08c7640e62e8717abf4d44a6c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b36ef9a0b6fbd6e73fb3acf909349c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2150cb0060a14e88e93c33cf456ae832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cec2151f42e66f9902dca423235b67f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32b489dc708f75a60cc4c9dcec5cb6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18eb689ecf90784586123facc12bcec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】(1)已知单位向量
与
的夹角为
,且
,
,求
;
(2)已知
,
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9559b133927dd68c23db772fb061fb92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf321b9634a90680341dcf1938022b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9883f16cdef5fb87fb9d6a9897d113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ff265969988f1f138700129e5d7a6d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c909dd73cd3bef544ae822975d47586a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
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【推荐2】已知向量
与
的夹角大小为120°,且
,
,求
的值.
![](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/d8ae0d7b3266f32b6a916b6237b6b838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a4fe23b799a0777b2faebd77dd05bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76641988bc890c789f160f73f60d07d4.png)
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【推荐1】已知向量
满足
,
且
和
的夹角为
.
(1)求;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acdc2475b065cfc88e27419a65b2d842.png)
(2)求向量
在向量
方向上的投影向量的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91d01fc86ff537707c69f8c860a50a68.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/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
(1)求;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acdc2475b065cfc88e27419a65b2d842.png)
(2)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3143307ad0ba4a631eac04e814993655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
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【推荐2】如图,已知O为平面直角坐标系的原点,
,
,
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964980874887168/2970554110337024/STEM/5d52026e-6228-4f29-ae3e-f23ed45405b3.png?resizew=167)
(1)求
和
的坐标;
(2)求向量
在向量
上的投影向量的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f455353f09b4c255f8a5efeb72b9e93c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc892805954ac269d08284d79d38e559.png)
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964980874887168/2970554110337024/STEM/5d52026e-6228-4f29-ae3e-f23ed45405b3.png?resizew=167)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20ec3efaa6b6ff5769e8999df5714a9.png)
(2)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
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【推荐3】已知向量
.
(1)求向量
在向量
方向上的投影向量
;
(2)确定实数
的值,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffe92a8c7181f0774e3a329143e0d6a.png)
(1)求向量
![](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/c37564ec4e9e92485f1769e8ffaac31d.png)
(2)确定实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb68e050589a923a144b6c143292651.png)
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