解题方法
1 . 已知下列命题:
①命题:“
,
”的否定是:“
,
”;
②若
,则
,
;
③若
,则
,
;
④等差数列
的前
项和为
,若
,则
;
⑤在
中,若
,则
.
其中真命题是________________ .(只填写序号)
①命题:“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb49f7407b400d314e55972e4376711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c338589ee42165471b7a0328508950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d374ca687bd81e60d70bf24c99fb8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e63868933ac4e413af3b78a841edbd.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b586d5da50edf2b5d624b1f3368570eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d88a41a8c39757a1bbcc8ae9052c67.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a81a37e05f73b403777cb6efdb2ca3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a28e0ab7243fc8133982902400c531f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d6cd6c41f47a05d68ba4c933dd1761.png)
④等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0abedd59476f8793d5a8948590a70c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26de461c33b78123e272a85ec6a86c7b.png)
⑤在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
其中真命题是
您最近一年使用:0次
2022-04-29更新
|
357次组卷
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2卷引用:专题02命题与常用逻辑-2022年新高三数学暑假自学课精讲精练
名校
2 . 在下列命题中,正确的命题有________ (填写正确的序号)
①若
,则
的最小值是6;
②如果不等式
的解集是
,那么
恒成立;
③设x,
,且
,则
的最小值是
;
④对于任意
,
恒成立,则t的取值范围是
;
⑤“
”是“复数
(
)是纯虚数”的必要非充分条件;
⑥若
,
,
,则必有
;
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef389807e5cb964f7756c6841f7161d.png)
②如果不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae8fff7c98b78992edcd61daf6ea72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7b2668d8fcf713370822c8e368ba7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da693578d4cd0c841fd529fe7ebfe4d.png)
③设x,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2519954ec2deabecd7e057886fa4023c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8887f77124cbe18a4931826ede9c9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
④对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b687f97094676b2755bc724219a58520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ce220e0583c843810d4b44de111156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49bc53d70ee599df5cad39f06f728c2.png)
⑤“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d96d22950baabd8ca6647205f1d3cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
⑥若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2e606c883dace7fbd88223c8067885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9d3040a7a1fc2cf8ac555dbafc97dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc277eef249facf647e13a58e3c2fe26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/297a7062ba8f240d7517f0dd3ee6a27d.png)
您最近一年使用:0次
名校
3 . 已知函数
.
![](https://img.xkw.com/dksih/QBM/2022/2/16/2897018205675520/2918333110239232/STEM/3549bddf1e9b449e8f9d13dc109375c9.png?resizew=270)
(1)画出
的图象,并根据图象写出
的递增区间和递减区间;
(2)当
时,求函数
的最小值,并求y取最小值时x的值.(结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adaa5b750211a0524fd66498aa0e8a57.png)
![](https://img.xkw.com/dksih/QBM/2022/2/16/2897018205675520/2918333110239232/STEM/3549bddf1e9b449e8f9d13dc109375c9.png?resizew=270)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e82cc461b9607e08a8b31597f6d26df.png)
您最近一年使用:0次
2022-02-17更新
|
806次组卷
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6卷引用:专题19 函数的基本性质 (1)
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