1 . 下列哪些命题是真命题?_______
(1)
是
的充要条件
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7601a33e9cf63db183630b01ac84032e.png)
(3)
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b01df04fd13dd27cd4acf6645367196.png)
(4)若
为无理数,则
为无理数
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5206984aa8c1487f1ed2528045b16b18.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7601a33e9cf63db183630b01ac84032e.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20a1af4425e9b77626f10f270e23648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b01df04fd13dd27cd4acf6645367196.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
您最近一年使用:0次
2 . 给出下列命题:①“
”是“
”的充分不必要条件;②设
,
,若
,则实数
的取值范围为
;③若
,则
;④存在
,
,使
;⑤若命题
:对任意的
,函数
的单调递减区间为
,命题
:存在
,使
,则命题“
且
”是真命题.其中真命题的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2053e1f50472a9fed67d4c84d9cb938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eafac451fc3d22d2bb1440fe5ed2e67b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ea57cacdc4afffa350a44d0172e48f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9e66b73038b6279d204a47a78902ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81870ba62e458c9adb1d03fe3413366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f370a1d4dd341e5ab1774a66c66c1204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b18fd99b9cf551fe9b6c20712b43690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513476ba76545dc22a28ab04d408600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19ae495b3d5fc27baf432bb1673353e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d62778cf443743b33383960b106f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
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名校
3 . 给出下列四个结论:
①若角
为第一象限的角,则角
必为锐角;
②对任意的复数z,都有
;
③设
是空间一个平面,m,n是空间两条不同的直线,且
.则“n
m”是“n![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
”的充分条件;
④在三角形ABC中,若A<B,则
.
所有正确的结论序号为___________ .
①若角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②对任意的复数z,都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc1cc625fa294fdfc3fcda43c4bff2e.png)
③设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539a38ada26356d73024fb8533449c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
④在三角形ABC中,若A<B,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b2f44bda467c786287c7356d4ed9f7.png)
所有正确的结论序号为
您最近一年使用:0次
2022-06-25更新
|
386次组卷
|
3卷引用:考向02 常用逻辑用语(重点)
解题方法
4 . 在四棱锥
中,
平面
,底面四边形
为矩形.请在下面给出的4个条件中选出2个作为一组,使得它们能成为“在
边上存在点
,使得
为钝角三角形”的充分条件______ .
①
,②
,③
,④
.(写出符合题意的一组即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd3355d3bee7e168af3bec0662b7dd8.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149452943360/2958088611766272/STEM/81c9c0737f2c438d9bfa67fba0af8169.png?resizew=238)
您最近一年使用:0次
5 . 给出以下命题:
① “
”是“
,
”的充分不必要条件;
②垂直于同一个平面的两个平面平行;
③若随机变量X~N(3,
),且
,则
;
④已知点P(2,0)和圆O:
上两个不同的点M,N,满足∠MPN=90°,Q是弦MN的中点,则点Q的轨迹是一个圆.
其中正确命题的序号是___________ .
① “
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a646ca216ddaca0dcb69e55f6af6cb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438304e49a0bf47d5f1fffd58783f031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683bad0a4204ff3435bf7e2479d4c98e.png)
②垂直于同一个平面的两个平面平行;
③若随机变量X~N(3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/742d3e642d52e01899f66df411100838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c643826510f95af32f2cb377720d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7204e1c4977aa8ae3c50922840334cb7.png)
④已知点P(2,0)和圆O:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a81f14a75a6ab7fbf82312da4512f5d.png)
其中正确命题的序号是
您最近一年使用:0次