现有下面三个命题:
:
,均有
;
:若一个数列既是等差数列也是等比数列,则该数列一定是常数列;
:底面为正三角形的三棱锥是正三棱锥.
则下列命题中为假命题的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b613c64876d25e61358264a2d40d1541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
则下列命题中为假命题的是
A.![]() | B.![]() |
C.![]() | D.![]() |
2018高三下·全国·专题练习 查看更多[2]
(已下线)2018年4月2018届高三第二次全国大联考(新课标Ⅲ卷)-文科数学(已下线)2017-2018学年度下学期高中期末备考【通用版】高二【精准复习模拟题】A【基础卷01】【文科数学】(教师版)
更新时间:2018-05-19 19:44:03
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解题方法
【推荐1】下列说法:①命题“
,若
,则
”是真命题:②以模型
去拟合一组数据时,为了求出回归方程,设
﹐将其变换后得到线性方程
,则c,k的值分别是
和0.3:③已知
是双曲线
的一个焦点,则点F到双曲线E的渐近线的距离等于b.正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f067a2409f73a953e08b09700eeb8276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d09b9fc9719ff6faf32254b9d48713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad3ff5f4d656390df3c9558f8cdc82e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d28162b2a8309f0f7f193e733be414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fd3f8b232a05d4ba000c4d10ae1271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414925ff8c46c7ceba920d034e02466f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24550b13dbecf7d86c7054250e987274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c4088276acdbede4781b2ebc466366.png)
A.0 | B.1 | C.2 | D.3 |
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【推荐2】下列说法中正确的个数是.
①
是
的必要不充分条件;
②命题“如果
,则
”的逆命题是假命题;
③命题“若
,则
”的否命题是“若
,则
”.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16b91037706568b715b30216f1cfc77.png)
②命题“如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56e774c48d99c7834d4a02d855a5e95.png)
③命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e30c903d8f8a05332af0b19e7e40df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8a2a94168af9b16ce89271a5d8dc6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fdf7d28b97fb6fe731703f80e122ed.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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名校
【推荐1】已知命题
存在
,曲线
为椭圆;命题
的解集是
.给出下列结论中正确的有( )
①命题“
且
”是真命题;②命题“
且(
)”是真命题;
③命题“(
)或
”为真命题;④命题“(
)或(
)”是真命题.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571c78518c334d81000410e1d32a4ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5451ffa7df608ff6a37195768ee980b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224c9ac849d8af13be694b7f8f628e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947ecd8738996c7a9fc88e0f974f20c0.png)
①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/9e26b38e357c7d985656ba7bb3c794a5.png)
③命题“(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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名校
【推荐2】已知命题
:
N
,
,命题
:
R ,
,则下列命题中为真命题的是.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0aa9d781436ea046ee072ca8482f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec53fd82557a22187381f646a5b8293.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1197e3bcf15554459c59066b590673a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df03c12741f6ac84b451569c55464ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f901ef167c7b4197a5aad140a023d008.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】已知命题
:
,
;命题
:
,
则下列命题中为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35eac3ba2858adffcd1f8052cd795269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7e2c4c2da86469c486f0809cd2fdf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd14c8dbe17d5f981cf4aefae9c4a04.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】命题
:函数
有零点;命题
:存在
、
,使
,在
,
,
,
,
中真命题有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6ad8db9421e013d47149396d981a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ba299906b6ac06008cf48bf8222072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b282201fb449f577cf664148afc9b2f.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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