1 . 方程
表示圆的充要条件是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a52f8e6287412bdad953624e54da68.png)
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2 . 命题p:
,
成立的充要条件是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e821a8227ad1fabef2c1e3e5c8999c60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902c0ba2ca26b5ac7b9ca2fd5532fa4b.png)
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2022-10-13更新
|
950次组卷
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4卷引用:江西省宜春市丰城市第九中学2022-2023学年高二重点班(28、29班)上学期期末考试数学试题
解题方法
3 . 若
,则
的充分必要条件是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255483db09b1e523a4fcc1f618b98ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c1e7d86796fa60cfd08eaa0fbfe10a.png)
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4 . 已知复数
,则“z为纯虚数”的充分必要条件为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e247ff341069530c32b38c9f5514eb7.png)
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2020高一·上海·专题练习
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5 . “
”是“
”成立的_____________ 条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33dddc9099e1ec7a1ddea8c73c8daaab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f84d5bc0134bfe9eeac72c8813e0579d.png)
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2021-03-12更新
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339次组卷
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3卷引用:黑龙江省大庆市东风中学2020-2021学年高二下学期期末考试数学(文)试题
黑龙江省大庆市东风中学2020-2021学年高二下学期期末考试数学(文)试题(已下线)专题03+常用逻辑用语(1)(命题,充分条件与必要条件)-2020-2021学年新教材高一数学秋季辅导讲义(沪教版2020)内蒙古自治区通辽市科尔沁左翼中旗实验高级中学2023-2024学年高一上学期期中数学试题
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6 . 直线
与直线
平行的充要条件是___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea7b252321ba9d3fd34f51f553d6176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4756793ac830556188182ee2d02de83.png)
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7 .
是函数
为偶函数的___________ 条件(填充分不必要,必要不充分,充要,既不充分也不必要)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b917df0520097be222accbddf9394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d5e308cd5469e0f28a8d75f79903f.png)
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8 . 下列命题中,真命题的序号有____________ .
①
,
;
②若
,则
;
③
是
的充分不必要条件.
④
中,边
是
的充要条件.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117984d9c0418b68dbd9feee8eeb0a6d.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc2b8d080ce63b05659ee94541edce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32fab4d848145fb62a135e05648d5964.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a5815a2dbaa43eb40f689a4613619d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d168aaaa03c5eeff1b2ebdd688346af6.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
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2020-07-11更新
|
255次组卷
|
3卷引用:黑龙江省哈尔滨市第三中学2019-2020学年高二6月阶段性测试理科数学试题
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9 . 下列说法中正确的个数是_________ .
(1)命题“若
,则方程
有实数根”的逆否命题为“若方程
无实数根,则
”.
(2)命题“
,
”的否定“
,
”.
(3)若
为假命题,则
,
均为假命题.
(4)“
”是“直线
:
与直线
:
平行”的充要条件.
(1)命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a878fd5a7104a7f42770a19097d56457.png)
(2)命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e4848e12d90125411fb07a7e524de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e4848e12d90125411fb07a7e524de6.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(4)“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b4ce86bbf235a9b89177f9a9b01efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d856992f70b11162719ea779d9a04df.png)
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2020-01-17更新
|
317次组卷
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3卷引用:黑龙江省大庆市让胡路区铁人中学2019-2020学年高二上学期期末数学(文)试题
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10 . 有限集S中的元素个数记作
,设A、B是有限集合,给出下列命题:
(1)
的充分不必要条件是
;
(2)
的必要不充分条件是
;
(3)
的充要条件是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70135fccebb89692c71545c7610453fc.png)
其中假命题是(写题号)________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824dc88e8fa0803c32405e964f884c11.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c10471fdfa9693ced19e2077dd641a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2e606b3fa4b1a5af6fdf88d317338b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70135fccebb89692c71545c7610453fc.png)
其中假命题是(写题号)
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