21-22高二上·全国·课前预习
1 . 设抛物线
的焦点为
,准线与
轴的交点为
,且过点
的直线
交抛物线于
,
两点.
(1)若直线
的斜率为
,求证:
;
(2)设直线
,
的斜率分别为
,
,探究
与
之间的关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967eccd4d0ce9e659291edc9d8fa80b7.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa10927c1956af71ed89fe7d88f3949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940978eb7642da5b75e4114658687a6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940978eb7642da5b75e4114658687a6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa10927c1956af71ed89fe7d88f3949.png)
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解题方法
2 . 已知向量
之间的夹角为
,且
=3,
4,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dccf5af2912b02864d4c3981225fad8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7787902056794fd718bfeec12825522b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1ac82158fd49eeeb1a4923a1c98bf8.png)
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2021-09-02更新
|
462次组卷
|
3卷引用:1.1.2 空间向量的数量积运算(基础知识+基本题型)-【一堂好课】2021-2022学年高二数学上学期同步精品课堂(人教A版2019选择性必修第一册)
解题方法
3 . 已知向量a=(2,3),b=(k,1),若a+2b与a-b平行,则k的值是( )
A.-6 | B.- ![]() | C.![]() | D.14 |
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4 . 在下列两个命题中,真命题是( )
①若三个非零向量
,
,
不能构成空间的一个基底,则
,
,
共面;
②若
,
是两个不共线向量,而
=λ
+μ
(λ,μ
且λμ≠0),则{
,
,
}构成空间的一个基底.
①若三个非零向量
![](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/bb573cc0f30d5c32cdad1510793f0e7b.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/bb573cc0f30d5c32cdad1510793f0e7b.png)
②若
![](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)
![](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/160daec0ad9ccc242f3e259eb4d61ef6.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/bb573cc0f30d5c32cdad1510793f0e7b.png)
A.仅① | B.仅② | C.①② | D.都不是 |
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解题方法
5 . 如果
,则四点O,P,M,N一定共面.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3fcb4196d6b5832c787cfa3853fb02.png)
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6 . 四点A,B,C,D构成平行四边形ABCD的充要条件是
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da65df9df70430d0a095297a628f04c.png)
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7 . 若
,则A,B,C,D四点共线.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da65df9df70430d0a095297a628f04c.png)
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8 . 已知两个向量
的夹角为 60°,则 ∠NMP=60°.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a4c0821f742aa55fa5b25cf81092e6.png)
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9 . 向量
与
的夹角等于向量
与
的夹角( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ed9c2e9fabbfc63733bae8fa079d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fdc83becc28e0f43d71427d9e8775d4.png)
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10 . 若
,则λ=0或![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57a47c35195783f2eba8c6fd6649594.png)
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ebb215e473c34199bff42cc214cd41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57a47c35195783f2eba8c6fd6649594.png)
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