12-13高三下·山西太原·阶段练习
1 . 下列四个命题:
①直线
与圆
恒有公共点;
②
为△ABC的内角,则
最小值为
;
③已知a,b是两条异面直线,则过空间任意一点P都能作并且只能作一条直线与a,b都垂直;
④等差数列{
}中,
则使其前n项和
成立的最大正整数为2013;
其中正确命题的序号为___________ .(将你认为正确的命题的序号都填上)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6700e26302ad11083f51f0a658dd66af.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef4e53da3156f7e552217b6927f0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db9373e74ecf5d63ad98afe66aa4ba.png)
③已知a,b是两条异面直线,则过空间任意一点P都能作并且只能作一条直线与a,b都垂直;
④等差数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d4100ee7024bf6f5b0f106962e30ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937228faf3b035ce9fb607ec96f707f0.png)
其中正确命题的序号为
您最近一年使用:0次
2 . 对于下列说法:
①方程
表示的图形是圆;
②对任意实数
,直线
平分圆
;
③若直线
与直线
垂直,则实数
的值为
或
.
④已知圆
的半径为
,
,
为该圆的两条切线,
,
为两切点,那么
的最小值为
.
其中所有正确说法的序号是______ .
①方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd36119f10abe3d734a320580ca530d4.png)
②对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/889e8229d3900a55687af7d5cfa9f283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4ee22fbd02d14f7764a81694df5d88.png)
③若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132fd1617b4be21e8c520dbaefa413df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c127706d04bcad738d20e24fad70809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
④已知圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.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/8a33e5d0dbdd0f15854f0d7dd8b53058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc5636bddc636487839d47a0b17eed57.png)
其中所有正确说法的序号是
您最近一年使用:0次
3 . 已知抛物线
和点
,直线
与抛物线
交于不同两点
,
,直线
与抛物线
交于另一点
.给出以下判断:
①以
为直径的圆与抛物线准线相离;
②直线
与直线
的斜率乘积为
;
③设过点
,
,
的圆的圆心坐标为
,半径为
,则
.
其中,所有正确判断的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ac8fa800c00933279f2b20e5034438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d161e8acdc95d6aa31000a5f4531f187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
③设过点
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d98fd67fb21b6b30b12bc6f29efea17c.png)
其中,所有正确判断的序号是( )
A.①② | B.①③ | C.②③ | D.①②③ |
您最近一年使用:0次
2020-04-14更新
|
1365次组卷
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5卷引用:2020届四川省广安市高三第二次诊断性考试试题理科数学试题