已知向量
,
,且
,
满足关系![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8c1ceb2bfdf5d67c2cf0e4226ebc4f.png)
.
(1)求向量
,
的数量积用k表示的解析式
;
(2)求向量
与
夹角的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38422db79bd5c61fd0b4aaa6b7e67d9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f00c8f7275f2b13ae25ce1c7c0f0381d.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/5f8c1ceb2bfdf5d67c2cf0e4226ebc4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b377f632949bff36083a5464113387fe.png)
(1)求向量
![](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/a0e6cb8d4e39fa44f71df04b74f123f4.png)
(2)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
更新时间:2020-02-14 16:28:28
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】已知函数
.
(1)用定义证明
在区间
上是增函数;
(2)求该函数在区间
上的最大值与最小值;
(3)直接写出函数的值域(不需要写解答过程).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c117702f7682a02c401e28e696d851cf.png)
(1)用定义证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03db4ea1dcb63b22cf4e917df5db581e.png)
(2)求该函数在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de71d25c72850e383a4c841eed0db99.png)
(3)直接写出函数的值域(不需要写解答过程).
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解答题-问答题
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适中
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解题方法
【推荐2】已知函数
.
(1)若
关于原点对称,求
的值;
(2)在(1)下,解关于
的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3bcb47be87d5f8fa18b6fab69a8f9fc.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)在(1)下,解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6fe5d8876b6992bb210a76ade8f1ad9.png)
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解答题-问答题
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解题方法
【推荐1】在梯形
中,
为钝角,
,
.
(1)求
;
(2)设点
为
的中点,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90e3dd2b3703ee2ab20e90b840a8cc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509eb54289249dbc851010297a96c12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef4c4ccf6b0373892fa33fc7b3c6947.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba2a482b03fc0f2545fb4b9109725f0.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【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
;
(2)若
,求
的最小值及对应的
的值.
![](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/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa3610a990287d3ac756abae406540d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404067afb19bd74f447a6c0c832af1da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437dc907211c5934f938d869f6b19e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc534301570714edc165bc77a012212d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e90829233d5af079441590113eb98b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720b5b3ff1e1238bfc35cc90d67bcbba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
解题方法
【推荐3】设两个非零向量
与
不共线.
(1)若
,
,
,求证:
,
,
三点共线;
(2)向量
与
的夹角
,且
,
,求
与
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fabf836a5eb2105f5a32160b75640c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3919c74b50641196033aa756ac2dd3d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d8fbf3fb296a64537058cced36e1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)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/dd15ead753cf2927f51d07c7727c6cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9936a46cc891744d4600f76bb92b694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082c6926889f84f438ea35f70bf05f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b91254db5ff748150f449c5cdd256c.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
【推荐1】如图,在正三棱柱
中,
是棱
的中点,
是棱
上一点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/87261db2-3670-4e79-a25b-9933770958c9.png?resizew=187)
(1)求证:
;
(2)求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60601a43c9cb33792a9dc05171f1ea59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d094534e4714e7060bc994b45e565fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/87261db2-3670-4e79-a25b-9933770958c9.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6707db343ee63e7cd57c38ad810dd309.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49282e671435e499a78d26c7b81a711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d180f7f14bba0d6e5ccf6cef37aa8f83.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐2】已知向量
是同一平面的三个向量,其中
.
(1)若
,且
与
的方向相反,求
的坐标;
(2)若
是单位向量,且
,求
与
的夹角
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96022a881e03e32d3483d997c3f170c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc038d02f8c463d4102ac1d730408e6a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed0703d32bda90a21d7c3d329e0b14f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acfd464c6799608a1b5bdc985d4a3759.png)
![](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/c24095e409b025db711f14be783a406c.png)
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