下列四个命题:
①函数
的最大值为1;
②“若
,则
”的逆命题为真命题;
③若
为锐角三角形,则有
;
④“
”是“函数
在区间
内单调递增”的充分必要条件.
其中所有正确命题的序号为____________ .
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142033c98d33d6befa597a3f6ac7e549.png)
②“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91bcddc2ece6bcde9355e222e1cf9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7abf8f79640c51c103343b3e43af2df.png)
④“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5f421939ee855f25927e7570d82c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a960c992628ae3b85cae0a04112067ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
其中所有正确命题的序号为
更新时间:2019-10-12 19:07:04
|
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|
适中
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【推荐1】下列命题:
①命题“
”的否命题为“
”;
②命题“
”的否定是“
”
③对于常数
,“
”是“方程
表示的曲线是双曲线”的充要条件;
④“
”是“
”的必要不充分条件;
⑤已知向量
不共面,则向量
可以与向量
和向量
构成空间向量的一个基底.
其中说法正确的有_____ (写出所有真命题的编号).
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c89213f0964911057cad42d4231c6174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6a68df9eefc9683d6d0b83488ffafe.png)
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13db1a4d6a28175b8c890da735b66e12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55c159febb30ca7ac392bae928e5db8.png)
③对于常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bdc69abbcdf98c42b649f8d8d4cd1ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2085af2326d0e13a12d3db8dbb79f51.png)
④“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e0b349cd216cfbe4c3e19eedb06f7a.png)
⑤已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12043fbdfadbf715bbc7969cdf71a907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572488309817344/1572488315551744/STEM/88009fbd8e2c41c4b08d13e3e66c6149.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2016/2/17/1572488309817344/1572488315551744/STEM/635df2f65914453b8a76ff9958ee3ce1.png?resizew=64)
其中说法正确的有
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【推荐2】下列命题中,真命题的序号_____ .
①
;
②若
,则
;
③
是
的充要条件;
④
中,边
是
的充要条件;
⑤“
”是“函数
在区间
上为增函数”的充要条件.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab483cedd210066f51c0f483faa405d.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)
⑤“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9be1274261479870782428af6f1539a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e650801ccc7f4f5e4bc1fe38a2f8c8.png)
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