12-13高三下·海南省直辖县级单位·阶段练习
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1 . 下列说法中错误的是( )
A.若命题![]() ![]() |
B.“![]() ![]() |
C.命题“若![]() ![]() ![]() |
D.若![]() ![]() |
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2 . 给出下列三个命题:
①函数
的单调增区间是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23750beb415798915d6958d04bf30301.png)
②经过任意两点的直线,都可以用方程
来表示;
③命题
:“![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dac463bbb7375dbf8e2246f9a6f0d9.png)
,
”的否定是“
,
”,
其中正确命题的个数有个
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a5bca61e52b7aabe1f4f7fd932d313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23750beb415798915d6958d04bf30301.png)
②经过任意两点的直线,都可以用方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0807664c6f46f14df966ea4a6d8dae.png)
③命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dac463bbb7375dbf8e2246f9a6f0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72120311e5ee5b259439c87d5e9d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371dfe9673b7df9d53e6d0dd6ad6f20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e3647b50eb753571192a5e0f5be63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc15062c78f3fcaf0d8ed4a7b3a69572.png)
其中正确命题的个数有个
A.0 | B.1 | C.2 | D.3 |
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3 . 已知命题![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
,命题
“
”是“
”的必要不充分条件,则下列命题正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/124dc33051b4ab4671283577da2528fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03a1ba0b3996f89690f00c97c03be67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28dc2f8aba29f8c921b739b955d4686f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 下列说法中正确的是
A.若命题![]() ![]() ![]() ![]() |
B.若“![]() ![]() |
C.已知![]() ![]() ![]() |
D.命题“若![]() ![]() |
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5 . 已知命题
;命题
;则下列命题为真命题的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54ae8d35cafa68cc8a11bab1cd31b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1662d1506d1c25eed4f169d0119828f1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5卷引用:四川省成都市郫都区2018届高三阶段测试(期中)数学(文)试题
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6 . 给出以下命题,其中正确的命题的个数是( )
①存在两个不等实数
,使得等式
成立;
②若数列
是等差数列,且
,
,则
;
③若
是等比数列
的前n项和,且
,则
;
④已知
的三个内角A,B,C所对的边分别为a,b,c,若
,则
一定是锐角三角形;( )
①存在两个不等实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045368662212309d776c11dce5ff5ee3.png)
②若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6fb1dbeaaa23449ccfec570b9433ec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16400fbbee7c9a12992b4067eeb6a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd54306527dd6fea364fdc7499e7e6f1.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a342d9aa13ddbe7903446bb8ba099ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9becf27eaf9b798ec874ba04c91c48e7.png)
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95563a79e3b68c597ae1e5167516ff88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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2013·四川乐山·一模
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7 . 下列命题为真命题的是
A.若![]() ![]() |
B.“![]() ![]() |
C.命题“若![]() ![]() ![]() ![]() |
D.命题p:![]() ![]() ![]() ![]() ![]() |
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8 . 下列说法正确的是
A.命题“若![]() ![]() ![]() ![]() |
B.命题“![]() ![]() |
C.命题“若函数![]() ![]() ![]() |
D.“![]() ![]() ![]() |
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9 . 设有下面四个命题
:若
,则
;
:若
,则
;
:
的中间项为
;
:
的中间项为
.
其中的真命题为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd03dc2a13e9cafadfd86fe4be3ff637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7054cb13c57d45b0834e781e37c4ea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd03dc2a13e9cafadfd86fe4be3ff637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969ae7e4bac0f176c569189b9944e834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b323dfdf6a1689ef048c036af9f02a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ef63ad7b61f3fae0ac81148e7700ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc119550ce4fc5f3d1daf996e7243bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b323dfdf6a1689ef048c036af9f02a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14aa86103438dee429c799a6c62e79b.png)
其中的真命题为
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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10 . 设
,命题:若
,则
有实根的否命题是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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