名校
1 . 给出下列命题:①定义在
上的函数
满足
,则
一定不是
上的减函数;
②用反证法证明命题“若实数
,满足
,则
都为0”时,“假设命题的结论不成立”的叙述是“假设
都不为0”;
③把函数
的图象向右平移
个单位长度,所得到的图象的函数解析式为
;
④“
”是“函数
为奇函数”的充分不必要条件.
其中所有正确命题的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e8e22f77fdcc525184134ab9c8259d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
②用反证法证明命题“若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb20e291772c2614ad19f4cc919dfec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
③把函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ca435490094913416be5e3749b50e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf36e9bbe4dc23bb02d452d38afb9d4.png)
④“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e53dcb1e01ee03b34cd5f893d377b83.png)
其中所有正确命题的序号为
您最近一年使用:0次
2017-08-22更新
|
825次组卷
|
3卷引用:江西省新余市2016-2017学年高二下学期期末质量检测数学(文)试题
名校
2 . 如果用反证法证明“数列{an}的各项均小于2”,有下列四种不同的假设:①数列{an}的各项均大于2;②数列{an}的各项均大于或等于2;③数列{an}中存在一项ak,ak≥2;④数列{an}中存在一项ak,ak>2;其中正确的序号为______ .(填写出所有假设正确的序号)
您最近一年使用:0次
2020-01-31更新
|
167次组卷
|
4卷引用:上海市普陀区2016届高三上学期调研(文科)数学试题
3 . 给出下列命题:
用反证法证明命题“设a,b,c为实数,且
,
,则
,
,
”时,要给出的假设是:a,b,c都不是正数;
若函数
在
处取得极大值,则
或
;
用数学归纳法证明
,在验证
成立时,不等式的左边是
;
数列
的前n项和
,则
是数列
为等比数列的充要条件;
上述命题中,所有正确命题的序号为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee08def7a24d4255453ad40a77cd4e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd92e0bbdc7a5fd3d604160cf4306ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae018fde08edf0539089f98c17e11ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19bce4c604450307f40dcbd6a9ca6c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d0ce4e36a37c22267c03b54bd5ba3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f8c4d135ae1aa3911dec9d086b489d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2600a54b7bf3f79aaec7d49a47f6b4d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36a91b78ea833d5b09c11366324a845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a67312d6fbde2db992b25a11f4ec102b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/052c6cf4517966ecebd39354490b1723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c9d7f7f9a3e9ec476f5cf7fda97c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb989bea4883060e495e03e709593361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8b8edd94bc4d5d517ec77e56800e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f13167b6a291eeb91bd9a796745f6ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d493ee368a6be6e8de57368520c8cd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
上述命题中,所有正确命题的序号为
您最近一年使用:0次
4 . 用反证法证明命题“三角形的内角中至少有一个不大于
”时,假设命题的结论不成立的正确叙述是______ (填序号).
①假设三个角都不大于
; ②假设三个角都大于
;
③假设三个角至多有一个大于
; ④假设三个角至多有两个大于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
①假设三个角都不大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
③假设三个角至多有一个大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
您最近一年使用:0次
2017-05-25更新
|
527次组卷
|
2卷引用:江苏省沭阳县2016-2017学年高二下学期期中调研测试数学试题