9-10高三·福建漳州·期末
1 . 给出下列四个命题:
①抛物线
的焦点坐标为
.
②函数
在
上单调递减.
③对于任意实数
,有
,且
时,
,则
时,
.
④若命题
,使
,命题
,则命题“
”是真命题.
其中正确命题的序号为______________ .(把你认为正确的命题序号都填上)
①抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b62a460aef3370ee84bae1bae947403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a19636395e024f3f99bcd436dd85dd.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3122d8d5d984b6488438fcfd4d3125e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3adb9ed6e85993172051f0aa8e03eae8.png)
③对于任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e0935bef57475636130d73a53a0fd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9c89d2cd1fb46b1e71ad10227c098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82fe5cf30f6ae30a0c3abdcd56cdf33f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db053b743c6ecbf87eb04fd8041b4c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9728d4989ec38eed3f98fd0ab1abd798.png)
④若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee53862442f2c03abe4af095ecb6746c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf487bcad17e562acd2af561e0d37d14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4f132ff31c53270c6ab9c0488d14af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26b48685414b0c1b187179132143c284.png)
其中正确命题的序号为
您最近一年使用:0次
名校
2 . 已知
为两条不同直线,
为三个不同平面,下列命题:①若
,
,则
;②若
,
,则
;③若
,
,则
;④若
,
,则
.其中正确命题序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15bd315b801f71bc30b8d772098614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b215a2b3a2282ce790998ebaa2c34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e81e2fae4bf226cb0311850199f50d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229ad7ff99f02612a2647de5986f7471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542a1572078188c8fbe82ebddf8af3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35a45cfcdfbda18b089ce6698ccdbcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82e5d28e2e5a4790e94db2daa6a07c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675f1e09eb033dab8ef96d1f1c349150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187f7895012551f2067f0b77d8df2141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
A.②③ | B.②③④ | C.①④ | D.①②③ |
您最近一年使用:0次
2020-09-02更新
|
904次组卷
|
15卷引用:2020届陕西省咸阳市高三下学期第二次模拟考试数学(理)试题
2020届陕西省咸阳市高三下学期第二次模拟考试数学(理)试题2020届陕西省咸阳市高三下学期第二次模拟考试数学(文)试题四川省成都市第七中学高中2020届高三高中毕业班三诊模拟数学(理科)试题四川省成都市第七中学2020届高三高中毕业班三诊模拟数学(文科)试题甘肃省武威第六中学2020届高三下学期第六次诊断考试数学(理)试题(已下线)第32讲 平面的基本性质与推论-2021年新高考数学一轮专题复习(新高考专版)(已下线)专题8.3 空间点、直线、平面之间的位置关系(精练)-2021年新高考数学一轮复习学与练(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)-2021年新高考数学一轮复习讲练测新疆喀什市普通高中2022届高三上学期期末考试数学(理)试题新疆喀什市普通高中2022届高三上学期期末考试数学(文)试题安徽省阜阳市太和第一中学2020-2021学年高二(奥赛班)上学期开学考试数学试题甘肃省天水市第一中学2020-2021学年高三下学期第九次模考数学(理)试题2021届甘肃省天水市第一中学高三第九次模拟数学(文)试题(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)- 2022年高考数学一轮复习讲练测(新教材新高考)江西省九江市第三中学2020-2021学年高一下学期期中考试数学(文)试题
3 . 若平面点集M满足:任意点(x,y)∈M,存在t∈(0,+∞),都有(tx,ty)∈M,则称该点集M是“t阶聚合”点集.现有四个命题:
①若M={(x,y)|y=2x},则存在正数t,使得M是“t阶聚合”点集;
②若M={(x,y)|y=x2},则M是“
阶聚合”点集;
③若M={(x,y)|x2+y2+2x+4y=0},则M是“2阶聚合”点集;
④若M={(x,y)|x2+y2≤1}是“t阶聚合”点集,则t的取值范围是(0,1].
其中正确命题的序号为
①若M={(x,y)|y=2x},则存在正数t,使得M是“t阶聚合”点集;
②若M={(x,y)|y=x2},则M是“
![](https://img.xkw.com/dksih/QBM/2016/3/18/1572546403147776/1572546408783872/STEM/343a394834424e23bf4d72fde23c2d7b.png)
③若M={(x,y)|x2+y2+2x+4y=0},则M是“2阶聚合”点集;
④若M={(x,y)|x2+y2≤1}是“t阶聚合”点集,则t的取值范围是(0,1].
其中正确命题的序号为
A.①② | B.②③ | C.①④ | D.③④ |
您最近一年使用:0次
4 . 下列四个命题:
①样本相关系数r越大,线性相关关系越强;
②回归直线就是散点图中经过样本数据点最多的那条直线;
③设
是不同的直线,
是不同的平面,若
∥
,且
,
则
∥
且
∥
;
④若直线
不垂直于平面
,则直线
不可能垂直于平面
内的无数条直线.
其中正确命题的序号为
①样本相关系数r越大,线性相关关系越强;
②回归直线就是散点图中经过样本数据点最多的那条直线;
③设
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/6f76625f7891461594cab492e98560d3.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/51187429bb184c8faebbe9375e8015aa.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/e918659909ff41f09f1964f3d1268fd2.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/50efb111160546b8afbbd771fb253724.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/a7ab2de4a38046aba3e0f3ba2df0f56a.png)
则
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/70a5522db47a416987ecec1f392be2de.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/1d65d55792f84675b7c1a1bb75b8caec.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/70a5522db47a416987ecec1f392be2de.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/8479772fca5149bf889a7cb9174b5546.png)
④若直线
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/50efb111160546b8afbbd771fb253724.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/1d65d55792f84675b7c1a1bb75b8caec.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/50efb111160546b8afbbd771fb253724.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572483885539328/1572483890921472/STEM/1d65d55792f84675b7c1a1bb75b8caec.png)
其中正确命题的序号为
A.①②③ | B.①③ | C.①②④ | D.③ |
您最近一年使用:0次
11-12高三上·江苏泰州·期末
5 . 设
为互不重合的平面,
为互不重合的直线,给出下列四个命题:
①若
; ②若
∥
∥
,则
∥
;
③若
; ④若
.
其中正确命题的序号为_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/725be6759947d258592cd888c4db4561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e5774d5b442de3e16992df33984dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a454eb406d21dc2367ad24fc88f2ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee1679158b5854fcd7ab68263f623a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c68b1bb92ca3e5a1cf5d32041db1c6.png)
其中正确命题的序号为
您最近一年使用:0次
名校
6 . 下列说法:
①残差可用来判断模型拟合的效果;
②设有一个回归方程:
,变量
增加一个单位时,
平均增加5个单位;
③线性回归直线:
必过点
;
④在一个
列联表中,由计算得
,则有
的把握确认这两个变量间有关系(其中
);
其中错误的个数是
①残差可用来判断模型拟合的效果;
②设有一个回归方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4679a465811a2379ac7e3bf75877874f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
③线性回归直线:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd75f0367e604681eb260330bbe0533.png)
④在一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd3e2f836a3cbff3ca0f20edb56c68c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a363cc53497fdfac77b43f656424f973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca9ba41ac86aeba94b4d2c1bb81bf91.png)
其中错误的个数是
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2018-05-19更新
|
1216次组卷
|
10卷引用:宁夏石嘴山市第三中学2017-2018学年高二上学期期末考试数学(文)试题
宁夏石嘴山市第三中学2017-2018学年高二上学期期末考试数学(文)试题宁夏六盘山高级中学2019-2020学年高二下学期期末(文科)数学试题黑龙江省哈尔滨市第六中学2020-2021学年高三上学期期末考试理科数学试题广西陆川县中学2017-2018学年高二下学期开学考试数学(文)试题【全国百强校】河北省唐山一中2017-2018学年高二下学期期中考试数学(文)试题(已下线)2017-2018学年度下学期高中期末备考【通用版】高二【精准复习模拟题】C【拔高卷02】【文科数学】(教师版)(已下线)2017-2018学年度下学期高中期末备考【通用版】高二【精准复习模拟题】C【拔高卷01】【文科数学】(教师版)宁夏贺兰县景博中学2020-2021学年高二上学期第二次月考数学(文)试题黑龙江省漠河市高级中学2020-2021学年高三上学期第一次摸底考试理科数学试题(已下线)第1章《常用逻辑用语》章节复习巩固提高练-2021-2022学年高二数学同步训练精选新题汇编(人教A版选修2-1)
名校
7 . 下列说法正确的是_________ (请把你认为正确说法的序号都填上).
(1)函数
的最小正周期为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(2)若命题
:“
,使得
”,则
:“
,均有
”
(3)
中,
是
的充要条件;
(4)已知点N在
所在平面内,且
,则点N是
的重心;
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8639eae0325866c58acd33302151d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(2)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1c77d129b56255baf3d76eb2a6c2ff.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
(4)已知点N在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202f58538466612afcf186e5c65d9a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次