2011·四川绵阳·一模
1 . 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) |
您最近一年使用:0次
2 . 下列有关命题的说法正确的是
A.命题“若![]() ![]() ![]() ![]() |
B.若![]() ![]() |
C.命题“存在![]() ![]() ![]() ![]() |
D.命题“若![]() ![]() |
您最近一年使用:0次
10-11高三下·四川成都·阶段练习
3 . 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 |
您最近一年使用:0次
11-12高三·四川攀枝花·阶段练习
4 . 设
是实数,命题“若
,则
”的逆否命题是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec8f6a68e0710eb8da47d9f2039c640.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421a473589d5abdd504fdb110828611a.png)
您最近一年使用:0次
5 . 下列四种说法中:
①命题“存在
,
”的否定是“对于任意
,
”;
②命题“
且
为真”是“
或
为真”的必要不充分条件;
③已知幂函数
的图象经过点
,则
的值等于
;
④已知向量
,
,则向量
在向量
方向上的投影是
.
其中说法错误的个数为
①命题“存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ef65b4857051425b927d056d5d07f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c23a4b7f6952b9e323301bc917a94e99.png)
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
③已知幂函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e719252ceff26414b576dcf546f39f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5cd10ac668b6d968c579147b46c690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54bd888bfb31bdd6cddc28e687304406.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
④已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21e2f1ab7c983cd9328fdc6e281949f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe4aa7751ac7cdaf57eeec30291d45e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
其中说法错误的个数为
A.1 | B.2 |
C.3 | D.4 |
您最近一年使用:0次
6 . 下列命题正确的是
①“
”是 “
”的必要不充分条件;
②函数
的对称中心是
(
);
③“
”的否定是“
”;
④设常数a使方程
在闭区间[0,2
]上恰有三个解
,
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35bacde908aec2c313978fc4309d82bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7500649a06834aba5a778d624ab56ad6.png)
①“
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572051952041984/1572051957219328/STEM/9f62a5c7b5bb4e8db4be4c1c19ff3f94.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572051952041984/1572051957219328/STEM/3f6ed87ffc9f4daf908b128264d77e60.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb390c9f1102f2d17555d74ac243aa86.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572051952041984/1572051957219328/STEM/5ab1593eaa54456f97b07853af4644e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6029b3e81a9d7eeba4308d2362d35740.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d150f4f9281d03624e95313de93e256c.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572051952041984/1572051957219328/STEM/800a56a2bae146dfac913ff94ca16631.png)
④设常数a使方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677b901b829cd0725ad8915853accc62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d5adfe85535b699655d5ed2f3322d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/659be8fe3555d24e9b63f882a52df109.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35bacde908aec2c313978fc4309d82bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7500649a06834aba5a778d624ab56ad6.png)
A.①③ | B.②③ | C.②④ | D.③④ |
您最近一年使用:0次
2012·四川遂宁·一模
7 . 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
您最近一年使用:0次
13-14高三上·四川眉山·阶段练习
8 . 对于以下判断:
(1)命题“已知
”,若x
2或y
3,则x+y
5”是真命题.
(2)设f(x)的导函数为f'(x),若f'(x0)=0,则x0是函数f(x)的极值点.
(3)命题“
,ex﹥0”的否定是:“
,ex﹥0”.
(4)对于函数f(x),g(x),f(x)
g(x)恒成立的一个充分不必要的条件是f(x)min
g(x)max.
其中正确判断的个数是
(1)命题“已知
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/b2ddd308b69d403cae22814cbf20655a.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/fd677740f7204520a1ffca73178050bc.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/fd677740f7204520a1ffca73178050bc.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/fd677740f7204520a1ffca73178050bc.png)
(2)设f(x)的导函数为f'(x),若f'(x0)=0,则x0是函数f(x)的极值点.
(3)命题“
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/666050d6fa164b389e1b476c46d294f0.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/4620175de6c44db6bc2809db29206c1b.png)
(4)对于函数f(x),g(x),f(x)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/e1b34d971e1947c5a4c084c292fb3da2.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/e1b34d971e1947c5a4c084c292fb3da2.png)
其中正确判断的个数是
A.1 | B.2 | C.3 | D.0 |
您最近一年使用:0次
9 . 已知两个实数
,满足
,命题
;命题
.则下面命题正确的是
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572004579082240/1572004584759296/STEM/9135991092be4ebcb736849db78c6601.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572004579082240/1572004584759296/STEM/bc2dca57cc1349b48cb20557ec590ac6.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572004579082240/1572004584759296/STEM/47558297bc234584ac04b5d228565ba9.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572004579082240/1572004584759296/STEM/1c3d18fee32d41479eff4e6bbeb4ac6c.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次