解题方法
1 . 已知
,
且
与
的夹角为
,又
,
,
(1)求
在
方向上的投影;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0ae443a505d263c44a3d7515fd0170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf342e77c56e55a35bb1151bc215a3a2.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/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423774449249f4f557af18cb2eab1b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/444f57ed98743b4df0fad7c7bf3dd4d2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316699c45f1c088945d0cd3bb46eecfb.png)
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2 . 已知
,
,且
,求向量
在向量
方向上的数量投影.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e475ac4383c5442bedb92b7bf23e086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082c6926889f84f438ea35f70bf05f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9250f635c7286df7880ce805d122ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
您最近一年使用:0次
2021-03-25更新
|
350次组卷
|
2卷引用:沪教版(2020) 必修第二册 领航者 期末测试
名校
解题方法
3 . 已知平面向量
与
,且
,
.
(1)求
与
的夹角;
(2)求
在
方向上的投影.
![](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/70e310702748855c3edccd151aae0143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b574ac2684f90633174255c2125b6324.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca35e52b8430246a1cf96e9e617cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
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20-21高一下·浙江·期末
解题方法
4 . 已知函数
,点
,点
,和函数
图象上的点
.过B作直线
的垂线,垂足为Q.
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724631972438016/2724654508531712/STEM/fb601df9-7d9b-4d94-ba40-cdd36dab4ddd.png)
(Ⅰ)若
,求
(最后结果用a表示);
(Ⅱ)若
恒成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1a81492920894903aec53e797d8f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb30d60a5fd19a4064119f1991852a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab1eb15ebb7da16b52b95b6b69341f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b0ac6329573eca6908baecade254c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724631972438016/2724654508531712/STEM/fb601df9-7d9b-4d94-ba40-cdd36dab4ddd.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31924857ab43b4e18367d50530ce6966.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7412b9f823b19b3fa63a7287c2214d.png)
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名校
解题方法
5 . 如图,在扇形
中,
,半径
,
为弧
上一点,
是线段
上异于点
、
的一个动点.
(1)若
在
上的投影不小于2,求
的取值范围;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50bf7d7fa347c09dedde116bb787a3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7a046d7060dc843c78af806ee24f556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af18d542323baacfa180004c3449dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc7764d625d4c6c07e4946678cbee74.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59880e470359d8e9faf6ae5ce155cf2a.png)
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名校
6 . 已知
,
,且
与
的夹角为
,求:
(1)
在
上的投影;
(2)
;
(3)
与
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8faf351b569991fbdb8d8d30c72e72b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbcc0fa4b480c43e9a66273898c9a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44917f942c3fd36614f58d47b5fe1821.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cc8f1e4ec64189ce6b2400da174cf6.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614b003a9f14fed694128f681b2f1d91.png)
您最近一年使用:0次
2019-12-10更新
|
538次组卷
|
4卷引用:上海市上师大附中2018-2019学年高二上学期期中数学试题
名校
7 . 已知
,
两个向量,
,
,
,求
在
方向上的投影与数量投影.
![](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/4244dd3d11b8c8131ffecd896c12a27c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03ef3e7fb905b47f36c4630fcc65dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a036d32450fcf85f7b7d4e223084c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
您最近一年使用:0次
2021-07-13更新
|
253次组卷
|
2卷引用:上海市上海中学2020-2021学年高一下学期期中数学试题
8 . 在
中,设
,记
的面积为
.
(1)求证:
;
(2)设
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59146c0725095d4bca6caa7b3357ecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba2a1bf3e72ec2c2004495bc5a5aa68.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5a13ec22ea22408270baaaf4514eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0066f0f0e650bc85331c4e3db945f4b5.png)
您最近一年使用:0次
20-21高一下·上海浦东新·阶段练习
名校
解题方法
9 . (1)请你利用数量积的定义(非坐标运算公式)证明:
;
(2)已知向量
与
的夹角为
,
,
,记
,
,若
,求实数k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4251b01d3a622638a54f4b839bacf95.png)
(2)已知向量
![](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/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f18996bd00253c3ad9f91780103affb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03ef3e7fb905b47f36c4630fcc65dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05dbf33b2c0984ee458fa9dc91ecf412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495af06bb4bfd6573b9a0ed151d03af0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ee59964f020fc52b5ba66a3f5fcc3c.png)
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名校
10 . 已知点列
满足:
,
是自然数,且
,
,
.
(1)若
,求
的表达式;
(2)已知点
,记
,且数列
单调递减,求
的取值范围;
(3)设(2)中的数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee6ab09715b2211b4c30c0a66b82bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65651d338c5e6ea8e8c85cb96fdca33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c861e3728c51f2f447c24880cb7f0f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60302649eb940748da818199e55da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0cf06beb7cfde2c2ce4796bfe6d7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e34908326e74f6c3132fa0e132e64ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8743a10421b51fd1734929a318b613a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)设(2)中的数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bab7d5109d3c2088479ada60bf5b7d6.png)
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