2013·四川成都·一模
1 . 已知命题p:“若直线
与直线
垂直,则
”;命题q:“
”是“
”的充要条件,则
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/1642eef073234e0f9b2c98c5a33f85bb.png)
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/33b198bfbc344ec2895f2f9e7fb3c4d9.png)
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/5ef7c237736641c9907ec77b3e1799d2.png)
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/aa3d623bc2984f7099dc858f0fc49a94.png)
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/68b150d7d49744b9b2c5d42758cb17c5.png)
A.p真,q假 | B.“![]() | C.“![]() | D.“![]() |
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13-14高三上·四川绵阳·阶段练习
2 . 下列判断正确的是
A.若命题![]() ![]() ![]() |
B.命题“若![]() ![]() ![]() ![]() |
C.“![]() ![]() |
D.命题“![]() ![]() |
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2011·四川绵阳·一模
3 . 给出下列命题:
(1)设
是定义在
上的偶函数,且
存在,则
;
(2)设函数
是定义在
上的可导函数,则函数
的导函数为偶函数;
(3)方程
在区间
内有且仅有一个实数根.
其中为真命题
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189fb41709bf89d81d030521913bbbed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400b93e09e419e5f3671aeef96f3cc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ea743eb9d39671af570b886b0c8149.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c606e685439ee8753cd6c58eb284ec.png)
(3)方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5039a1af27edee9f55f1b3bb432f1647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
其中为真命题
A.(1)(2)(3) | B.(1)(2) | C.(2)(3) | D.(1)(3) |
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10-11高三下·四川成都·阶段练习
4 . 下列命题中:①函数
的最小值是
;②在
中,若
,则
是等腰或直角三角形;③如果正实数
满足
,则
;④如果
是可导函数,则
是函数
在
处取到极值的必要不充分条件.其中正确的命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/521be0b8fd38920c5e403e0bbbd773ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b883d9703a1deaf8dbc18097c6b8bb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf538440bd45e5881f2b22994560ba7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cbce35ea5e95e9947ab7f3f54d0227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1260c6fa15a4d739a41c5de1533e9e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
A.①②③④ | B.①④ | C.②③④ | D.②③ |
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2012·四川遂宁·一模
5 . 记
为不超过实数
的最大整数,例如,
,
,
.设
为正整数,数列
满足
,
,现有下列命题:
①当
时,数列
的前3项依次为5,3,2;
②对数列
都存在正整数
,当
时总有
;
③当
时,
;
④对某个正整数
,若
,则
.
其中的真命题有____________ .(写出所有真命题的编号
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/5b925d162bfc4a318451bad1de9ad8ad.png?resizew=23)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/ee1f89affe794fe28a117f4609b51d9c.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/28f3976fd0e74dcfa740282a0c341bd7.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/585434c31b274a3eb49fe551eb7c110e.png?resizew=54)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/31e2bd027744455983d7ad6b2278f8a7.png?resizew=74)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/4e4e78553d03415abc2b93bc28c798f1.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/3b4928d316ef4eabb5ddb44b63baadf0.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/c6f6a6dbfd564709871981504d79e9cf.png?resizew=42)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/afe2d5da14fa41dab475e950ae7ea768.png?resizew=166)
①当
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/6f139028b0714464a79f09f063c0e4e6.png?resizew=38)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/3b4928d316ef4eabb5ddb44b63baadf0.png?resizew=31)
②对数列
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/3b4928d316ef4eabb5ddb44b63baadf0.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/aa0c1e923f4c4bfca41504586d7ee39c.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/a6fd903d4ae44420b56481433e5ec9d8.png?resizew=38)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/697f7157508e423aa3561faa6f5f93cc.png?resizew=49)
③当
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/7010e667bfab43bdac2789b62e01af81.png?resizew=34)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/7f4c55d91a4f47b78d47b0509492088c.png?resizew=75)
④对某个正整数
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/aa0c1e923f4c4bfca41504586d7ee39c.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/307fd8cee4404a6da51acfd596455ca2.png?resizew=58)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/3a599da3f566443f9ef3dd04bcd68a02.png?resizew=66)
其中的真命题有
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