1 . 已知抛物线
与圆
交于
两点,且
,直线
过
的焦点
,且与
交于
两点,给出下列命题:
①若直线
的斜率为
,则
;
②
的最小值为
;
③若以
为直径的圆与
轴的公共点为
,则点
的横坐标为
;
④若点
,则
周长的最小值为
.
其中真命题的序号为__________ (把所有正确命题的序号都填在横线上).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f62686f6f9118291c444a8d5a4d0f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57dfc9d1109fe41145cc892b5702d9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
①若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9602114f45bdcb304e02710ae7bc0e08.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfcb3265d1351dc28c72f43e00f703e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3755d7e08b98c26303f2f61de7e7ddd2.png)
③若以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1689fe3683efa40a48684bb229c1c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
④若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba9f9108cac55a7758ec9f0a95c0805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcea00eeff85afba49364c1998ff4f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/251ad4474e7322ac72981d9c423fd443.png)
其中真命题的序号为
您最近一年使用:0次
2 . 若方程
所表示的曲线为C,给出下列命题:
①若C为椭圆,则实数t的取值范围为
;
②若C为双曲线,则实数t的取值范围为
;
③曲线C不可能是圆;
④若C为椭圆,且长轴在x轴上,则实数t的取值范围为
,其中真命题的序号为______ .(把所有正确命题的序号都填在横线上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e3d4ce1e61016c6b971f79d85ef9586.png)
①若C为椭圆,则实数t的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69abe959988e4c8c0739f5857ccfb0f.png)
②若C为双曲线,则实数t的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b931d943f5160350e6627a02736ff583.png)
③曲线C不可能是圆;
④若C为椭圆,且长轴在x轴上,则实数t的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57cfba44d536940fc258a1b0478b90b2.png)
您最近一年使用:0次
2021-11-16更新
|
342次组卷
|
4卷引用:天津市河东区2021-2022学年高二上学期期末数学试题
名校
3 . 定义:如果函数
在
上存在
,
,满足
,则称数
,
为
的上的“对望数”,函数
为
上的“对望函数”,给出下列四个命题:
①二次函数
在任意区间
上都不可能是“对望函数”;
②
为
上的“对望函数”,则
在
上不单调;
③函数
是
上的“对望函数”;
④函数
是
上的“对望函数”;
其中正确命题的序号为______ (填上所有正确命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2151e6ca1843b9457b8a47349467160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36adc4ecc55f14b9069c6657c0df6ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
①二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10eb13ecc3eb6d6c155882e0b70b083d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd56f8d9a837e2d69eb075563083ca35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87c830a03204a5b783ad4c2ba49c4e.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d71f56ef6906bc37ca312051d97d4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c627fffd029aace8c83ab69c7951a0e7.png)
其中正确命题的序号为
您最近一年使用:0次
2022-01-02更新
|
526次组卷
|
7卷引用:辽宁省朝阳市育英高级中学2022届高三上学期期末数学试题
辽宁省朝阳市育英高级中学2022届高三上学期期末数学试题(已下线)专题3.2 模拟卷(2)-2022年高考数学大数据精选模拟卷(新高考地区专用)湖南省湘潭一中、双峰一中,邵东一中2019-2020学年高二下学期联考数学试题北京市首师大附中2021届高三4月份高考数学模拟试题北京市第五中学2022届高三12月第二次阶段考试数学试题(已下线)江苏省南通市如皋市2023-2024学年高三上学期9月诊断测试数学试题上海市嘉定第二中学2024届高三上学期期中数学试题
4 . 在一副去掉大小王的52张扑克牌中随机抽取1张,记M表示事件“取到红桃”,N表示事件“取到J”,有以下说法:①M与N互斥;②M与N相互独立;③
与N相互独立.则上述说法中正确说法的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee035c6c34eef4268a150dab13117e9.png)
A.① | B.② | C.①② | D.②③ |
您最近一年使用:0次
名校
5 . 下列叙述中,
①等差数列
,
为其前n项和,若
,
,则当
时,
最小;
②等差数列
的公差为d,前n项和为
,若
,则
为递增数列;
③等比数列
的前n项和为
,若
,则
有最小项;
④在等差数列
中,记
,若存在
,使得
,则
为递增数列.
正确说法有______ (写出所有正确说法的序号)
①等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b134439819d3069da709979cb9b1a991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5846713aaecbab35ad985cbe9ad7d44a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6cd3173d146902c5518503888c3b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
②等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
③等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba5c8a6c196890aa7871ea0c82061ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
④在等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134aefab10d3e81e223e9123da5f417e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f29c06a3e9a73e905eb87d71efa201c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb50854126e66c09294192ed1db29ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
正确说法有
您最近一年使用:0次
6 . 数列
为1,1,2,1,1,3,1,1,1,1,4,…,前n项和为
,且数列
的构造规律如下:首先给出
,假若复制前面为1的项,再添加1的后继数为2,于是
,然后复制前面所有为1的项,1,1,再添加2的后继数为3,于是
,接下来再复制前面所有为1的项,1,1,1,1,再添加3的后继数为4,…,如此继续.现有下列判断:
①
; ②
;
③
; ④
.
其中所有正确结论的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11082835255e4054151694c77331b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e413cc989b74e0949abaa7182b504833.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5afcdc771dcbf3b0d48e10fd13a2b55c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af67926e775e11fb8bdded1e9cd3f9aa.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ebe8f8acaedc520ea1db0bbfe7973a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7842381350e30ad2a539323ec2edfbe7.png)
其中所有正确结论的序号为
您最近一年使用:0次
7 . 以下四个关于圆锥曲线的命题中:
①设A、B为两个定点,k为非零常数,若
,则动点P的轨迹为双曲线;
②抛物线
焦点坐标是
;
③过定圆C上一定点A作圆的动弦AB,O为坐标原点,若
,则动点P的轨迹为椭圆;
④曲线
与曲线
(
且
)有相同的焦点.
其中真命题的序号为______ (写出所有真命题的序号.)
①设A、B为两个定点,k为非零常数,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4562ddd51f544eaff300c9b4638646.png)
②抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315513892f06ef3ce82021d5e0566606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532eff5d4385426065732b3deec31426.png)
③过定圆C上一定点A作圆的动弦AB,O为坐标原点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a6bb839093992d42c6c813c73ccad2.png)
④曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a0bd4bd9985f1e367c100b453ed03f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4e82ca0fbf98b8903c97467acd1d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69c2e4498e7916dbc05a71fc0c316ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5c9d9221866bca2fd57b9b31100c62.png)
其中真命题的序号为
您最近一年使用:0次
名校
解题方法
8 . 甲、乙等6个班级参加学校组织的广播操比赛,若采用抽签的方式随机确定各班级的出场顺序(序号为1,2,…,6),求:
(1)甲、乙两班级的出场序号中至少有一个为奇数的概率;
(2)甲、乙两班级之间的演出班级(不含甲乙)个数X的分布列与期望.
(1)甲、乙两班级的出场序号中至少有一个为奇数的概率;
(2)甲、乙两班级之间的演出班级(不含甲乙)个数X的分布列与期望.
您最近一年使用:0次
名校
9 . 已知正方体
的边长为2,点E,F分别是线段
,
的中点,平面
过点
,E,F,且与正方体
形成一个截面,现有如下说法:
①截面图形是一个六边形;
②棱
与平面
的交点是
的中点;
③若点I在正方形
内(含边界位置),且
,则点
的轨迹长度为
;
④截面图形的周长为
;
则上述说法正确的命题序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
①截面图形是一个六边形;
②棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
③若点I在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786178c4141686b703850e72f87d12ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6836c9e3e3001df21030fbda3802b15.png)
④截面图形的周长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29587f681356659028a787bffa098417.png)
则上述说法正确的命题序号为
您最近一年使用:0次
2021-11-06更新
|
479次组卷
|
6卷引用:四川省遂宁市绿然教科院2021-2022学年高二上学期期末联考文科数学试题
名校
解题方法
10 . 如图,正方体
的棱长为1,E,F,G分别为
的中点,则下列说法正确的序号为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/f4445050-0ae4-4d14-852a-354b62e652d7.png?resizew=220)
①直线
与直线
所成角的正切值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
②直线
与平面
不平行
③点C与点G到平面
的距离相等
④平面
截正方体所得的截面面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4700efcb84c4027ce7a50af0d5212fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473ce0e22c4edc6ef768e0c12f59e483.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/f4445050-0ae4-4d14-852a-354b62e652d7.png?resizew=220)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04777f3f4661fa1c08a1cc0dfb807c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04777f3f4661fa1c08a1cc0dfb807c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
③点C与点G到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
④平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4700efcb84c4027ce7a50af0d5212fc.png)
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