已知直线l1的斜率为2,直线l2经过点
,且l1∥l2,则
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e63702d44435193c85b8c84cfb9cbac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539ad7d16f6f0cd23c3ffb1bb730f7da.png)
A.3 | B.![]() | C.2 | D.![]() |
2022高二·全国·专题练习 查看更多[1]
(已下线)专题2.1 直线的倾斜角与斜率(6类必考点)-2022-2023学年高二数学必考点分类集训系列(人教A版2019选择性必修第一册)
更新时间:2022-08-24 10:13:55
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解题方法
【推荐1】函数
的零点是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b09eda91915a173d8e63b221ffe792.png)
A.10 | B.100 | C.![]() | D.![]() |
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【推荐2】设函数
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6194d3181e199ba3de87f0ac5d6af83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348c82c55429f37d328c65953f2ddc0d.png)
A.2 | B.3 | C.![]() | D.![]() |
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【推荐2】已知角
的顶点为坐标原点,始边与x轴的非负半轴重合,终边上有两点
,
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1de2c0218509a1f3ededd231f68894b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2cb1413110a5b3ab7ce84965d31572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e80a2647e9df8964464937ca6fb45b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4b045a574fd9256859a7ad0659963f.png)
A.![]() | B.![]() | C.![]() | D.1 |
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【推荐1】已知直线
,直线
,且
∥
,若
均为正数,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e498cc8c8fc11783e092958fdba230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a7b20da27e2c209b4b96a82874810d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf35d6c316d9a014327ed3fdfeec374.png)
A.![]() | B.![]() | C.8 | D.24 |
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【推荐2】给出下列四个命题:
①如果
,则
;
②命题“
,均有
”的否定是“
,使得
”;
③在等差数列
中,已知公差
,那么数列
是递增数列;
④
是直线
与直线
平行的充分必要条件.
其中正确的命题个数是( )
①如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4101228d3031db311b4c24d7bb8e265.png)
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000611ae296699aedc383b220c0dc155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4da71f6e584c818c2602a49d4a38511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7671f3a9abacd64f2ff242064cffdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/798c58b48d964c00620151c1d3013109.png)
③在等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e54f7af574f7841441313ce7314b16f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea73dc274ba04520a207eff0998c2ed3.png)
其中正确的命题个数是( )
A.1 | B.2 | C.3 | D.4 |
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