1 . 已知命题![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
,都有
的否定是“
,使
”,命题
若
,则
,在命题①
;②
;③
;④
中,真命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc89ec9892c59b16657ead8ad187c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde43a5a73655af875cf6e03018a9e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35eac3ba2858adffcd1f8052cd795269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c01d0d6f0c566a008ee118f685a1ad18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b21208364124b5c477b2ff8df1c2e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc539c71b72aff71e7c8e31e74969d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e48ebdd742cb5d310c21a384d599bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6777065ed14d76944be5cb45d9e2c76.png)
A.①③ | B.①④ | C.②③ | D.②④ |
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解题方法
2 . 下列命题中,结论为真命题的组合是( )
①“
”是“直线
与直线
相互垂直”的充分而不必要条件
②若命题“
”为假命题,则命题
一定是假命题
③
是
的必要不充分条件
④双曲线
被点
平分的弦所在的直线方程为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0947dc8f5ba116aaf3239d66adc7474.png)
⑤已知过点
的直线
与圆
的交点个数有2个.
①“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8493a0cd10d3d0399173c04163740a38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f11b38211816b749811e8f4648e8bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00fc5596521e8da73990f853282cbc2.png)
②若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d4eed113aa69a7d973c6410bae7ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753bc7b46730ab08df9ee4488ce34986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e54bd9f96e4e7db247df972a5319532.png)
④双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d34cf4ed961f4052ed35c7475c7d32e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d3bfa155ad67018da4d65815c5e5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0947dc8f5ba116aaf3239d66adc7474.png)
⑤已知过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623afc24f2227004b0e1b3922dfb954b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6679a94c414a3aa0a24ac79ec27f0a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
A.①③④ | B.②③④ | C.①③⑤ | D.①②⑤ |
您最近一年使用:0次
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6卷引用:江西省萍乡市芦溪中学2021-2022学年高二上学期期中考试数学(理)试题
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3 . 下列命题为假命题的是( )
A.若![]() ![]() |
B.若![]() ![]() |
C.在![]() ![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
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|
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3卷引用:江西省萍乡市2020-2021学年高一上学期第一次月考数学试题
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4 . 有下列四个命题:
①互为相反向量的两个向量模相等;
②若向量
与
是共线的向量,则点
必在同一条直线上;
③若数列
满足
则数列
为等比数列
④若数列
满足
则数列
为等差数列;
其中正确结论的个数是( )
①互为相反向量的两个向量模相等;
②若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ed9c2e9fabbfc63733bae8fa079d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/085f1c56b0b8feedc729a5bb42f24707.png)
③若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67daeea55ac562b3410b7c0ae0c9e1c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
④若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdb318b1960eaf57e46d47b5329283e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
其中正确结论的个数是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 给出下列四个命题:
若
为
的极值点,则
”的逆命题为真命题;
“平面向量
,
的夹角是钝角”的充分不必要条件是
;
若命题
,则
;
命题“
,使得
”的否定是:“
,均有
”.其中不正确的个数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663d40fb80d2b0b5f9df8dbedde1e431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.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/abdab13be1e0b75550db1b6ad88c2b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd463885e37709119dc1be5bf0cafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793c117fa63444fb659854952e5e7cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8b8edd94bc4d5d517ec77e56800e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1c77d129b56255baf3d76eb2a6c2ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.3 | B.2 | C.1 | D.0 |
您最近一年使用:0次
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|
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3卷引用:【市级联考】江西省萍乡市2019届高三一模考试数学(文)试题