1 . 以下关于命题的说法正确的有______ (填写所有正确命题的序号).
①“若
,则
”是真命题;
②命题“若
,则
”的否命题是“若
,则
”;
③命题“若
,
都是偶数,则
也是偶数”的逆命题为真命题;
④命题“若
,则
”与命题“若
,则
”等价.
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba2c58e340ebcea00ef2a6d05a836301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3019b662e5dc2750bb6f9199d3250f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
③命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
④命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582ad43edf388c096e7704d92340bf75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5286186cb58bf265a2a96e5195d88d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab92728b35ed5798e07a2b0095bfcc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27dd329517f0dd8f1d0dfade6138ed4.png)
您最近一年使用:0次
名校
2 . 设数列
满足当
(
)成立时,总可以推出
成立.下列四个命题:
(1)若
,则
.
(2)若
,则
.
(3)若
,则
.
(4)若
,则
.
其中正确的命题是__________ .(填写你认为正确的所有命题序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c14f0220359ead94f73ba08d5988f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bca3179ad97cbe743dcb348f5ee031.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e3220209234bd5e4a263dbed082814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10aa049817b5c5e66c35058b65c63bc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38c5d56a437f36bde9ce723233e0063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39927871e1a12c7336505a7ac089c94a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cbf69ba0650aedf0b797cd1a55a174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10aa049817b5c5e66c35058b65c63bc.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13512d030a558543db1d05f33daada1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f640004b469d902d5c0ed3a52e4f1bd2.png)
其中正确的命题是
您最近一年使用:0次
3 . “
或
”是“
”的_________ 条件.(从“充要”,“充分不必要”,“必要不充分”“ 既不充分也不必要”中选择一个正确的填写)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c925c4283740ce6cc412c1c5f57b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3056bd950bb55035358d45d1b7d354c.png)
您最近一年使用:0次
2016-12-04更新
|
345次组卷
|
2卷引用:2015-2016学年山东省胶州市高二上学期期末考试理科数学试卷