名校
解题方法
1 . 已知函数
是定义在
上的偶函数,对于
,都有
成立,当
且
时,都有
给出下列四个命题:
①
②直线
是函数
的图象的一条对称轴;
③函数
在
上为减函数;④函数
在
上有四个零点.
其中所有正确命题的序号为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feedd7224f069d6d4796a3b6e5b23e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16014834857c7ad49afc420095b5239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4edc3ae354cf9044a395d7746796969.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41a385ff81845edeab1d0779594867d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a089c207e39a24d0d82aa853ac2bbb8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9577e0574ff58314de9b20b0a6c4a3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2760995ff6e41fa0759a2d5da4ec14.png)
其中所有正确命题的序号为
您最近一年使用:0次
2017-09-03更新
|
1531次组卷
|
2卷引用:河北省定州市定州中学2018届高三上学期第二次月考数学试题
名校
2 . 在下列给出的命题中,所有正确命题的序号为_____________ .
①若
,则
与
的夹角为锐角;
②对
,若
,则
;
③若实数
满足
,则
的最大值为
;
④函数
的图像关于点
对称.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1e552a1451270703a86e592d7dd656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
②对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6653dd342a6df38335d64e9e720e967d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a618d08d71463522c37df3378d358850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a07bb6242e3d0e762f946f158c379afb.png)
③若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17b0033ec26789418ffe13fa677e0f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8a1679a44eef126d97ee3b4fd81050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/610e79d39abb7b6e580961f487d455b0.png)
您最近一年使用:0次
2016-12-03更新
|
470次组卷
|
3卷引用:2015-2016学年河北省石家庄一中高二上学期期中数学试卷
14-15高三上·河北石家庄·阶段练习
名校
解题方法
3 . 在下列给出的命题中,所有正确命题的序号为____________ .
①函数
的图象关于点
成中心对称;
②对
,若
,则
或
;
③若实数
满足
,则
的最大值为
;
④若
为钝角三角形,则
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb18deb9367e12d39dcd54b310b63e58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
②对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70e0db0174a2c05b28fb6d0c2508778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a618d08d71463522c37df3378d358850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e30c903d8f8a05332af0b19e7e40df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f078bd034d679faeb1a01530af32783c.png)
③若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17b0033ec26789418ffe13fa677e0f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57067c1145bbe8c6cc231d7e74727032.png)
您最近一年使用:0次
4 . 2020年1月17日,国家统计局发布了2019年全国居民人均消费支出及其构成的情况,并绘制了如图的饼图.根据饼图判断,下列说法不正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/1/23/2642464959455232/2645184513548288/STEM/915d0869d8c042e3bcbaf5555cd9934a.png?resizew=416)
![](https://img.xkw.com/dksih/QBM/2021/1/23/2642464959455232/2645184513548288/STEM/915d0869d8c042e3bcbaf5555cd9934a.png?resizew=416)
A.2019年居民在“生活用品及服务”上人均消费支出的占比为6% |
B.2019年居民人均消费支出为21350元 |
C.2019年居民在“教育文化娱乐”上人均消费支出小于这8项人均消费支出的平均数 |
D.2019年居民在“教育文化娱乐”、“生活用品及服务”、“衣着”上的人均消费支出之和大于在“食品烟酒”上的人均消费支出 |
您最近一年使用:0次
2021-01-27更新
|
131次组卷
|
3卷引用:河北省高碑店市崇德实验中学2022-2023学年高一下学期期末数学试题
河北省高碑店市崇德实验中学2022-2023学年高一下学期期末数学试题贵州省盘州市2021届高三第一学期第一次模拟考试理科数学试题(已下线)考点47 推理与证明-备战2022年高考数学(文)一轮复习考点帮
解题方法
5 . 下列命题中正确命题的序号为___________
①函数
与直线x=l的交点个数为0或l;
②![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/21361760704748ffb1e4dac785797436.png?resizew=13)
,+∞)时,函数
的值域为R;
③R上奇函数
满足
,
<
时,
,则
;
④与函数
关于点(1,-1)对称的函数为
.
①函数
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/6b8b4699af0b45e7b95416b55772d6af.png?resizew=61)
②
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/21361760704748ffb1e4dac785797436.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/620c6863d3c94c0f9b7825d03cd5b914.png?resizew=33)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/d22c1ca84fb74989a7acdc4559efaebf.png?resizew=119)
③R上奇函数
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/844ca40ed4544f3a8b84335d881ef251.png?resizew=34)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/1d5fead9790646a9b3308afee32074f8.png?resizew=102)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/334394e210ac4276b4febad1ae780544.png?resizew=11)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/9e7c820a26134127b5ca13a0434de221.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/10ebf05cf8f7421184e914f9ead1ca60.png?resizew=66)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/a2c7e20aaa7e4a138d5dcab55d231aed.png?resizew=91)
④与函数
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/e5f37bcc95584199a096b7bcd3b14ec8.png?resizew=82)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286595072/STEM/3bb023c9d3c5497ea00dd602cc9c8df8.png?resizew=90)
您最近一年使用:0次
2012·河北·三模
6 . 下列四个命题:①若
,则函数
的最小值为
;
②已知平面
,直线
,若
则
//
;
③△ABC中
和
的夹角等于180°-A;
④若动点P到点
的距离比到直线
的距离小1,则动点P的轨迹方程为
.
其中正确命题的序号为_________
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/f7346d22823247f898035364c7decb75.png?resizew=59)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/5a3de8a91ea54f12927bec75b2917444.png?resizew=72)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/33cbfd263d9f4901a9c5929d0eec3246.png?resizew=32)
②已知平面
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/09c81b8c723f4a4bb45b26b2289250ec.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/babcca62adcc4e269f0ca20d76447f0e.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/773cd5fb03da4680a0739f0b76b6e464.png?resizew=133)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/57408d9d99cf4cc99d725fbc3762e2c5.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/94c51ba953dd4286a74539a43e23e912.png?resizew=17)
③△ABC中
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/d77373bc29854b458fb8bc5ba8bc6e66.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/3c1885307107407c8b2c46c59053fad8.png?resizew=25)
④若动点P到点
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/86e7be3ac7b74444aaaab9d82991ab58.png?resizew=45)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/648ec568a30840d7ade1729be8f41ca2.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570747699372032/1570747704819712/STEM/6a25baaa55a6430591cac31bb7a67c84.png?resizew=55)
其中正确命题的序号为
您最近一年使用:0次
7 . 若平面点集
满足:任意点
,存在
,都有
,则称该点集
是“
阶稳定”点集.现有四个命题:
①对任意平面点集
,都存在正数
,使得
是“
阶稳定”点集;
②若
,则
是“
阶稳定”点集;
③若
,则
是“
阶稳定”点集;
④若
是“
阶稳定”点集,则
的取值范围是
.
其中正确命题的序号为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46555735dde9e57ac52e1eeb687f3ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f38e916d4c713366616379768222c5da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd29dc9d11ca26bc64a31b344da89a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
①对任意平面点集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6d5b3bdd2b277ed94306cca2a39e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24688a4ab2e909d1002685bb68d7cb99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d59834cd0f5a9e7911c313c431c1bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b319d1866ba76cba6a91f09f610f50.png)
其中正确命题的序号为
A.①② | B.②③ | C.①④ | D.③④ |
您最近一年使用:0次
11-12高一上·河北衡水·期中
8 . 有下列四个命题:
①函数
为奇函数;
②函数
的值域为
;
③已知集合
,若
,则a的取值集合为{-1,13};
④集合A={非负实数},B={实数},对应法则f:“求平方根”,则f是A到B的映射.
其中正确命题的序号为:___________
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926b43dbd35eff88523739d4ba9220a2.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265f0662653525c979b3de4d60d75ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69c4421a0953af741c3254c09c667f8.png)
③已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c031143a2fc778038fd4b1192cdc42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
④集合A={非负实数},B={实数},对应法则f:“求平方根”,则f是A到B的映射.
其中正确命题的序号为:
您最近一年使用:0次
名校
9 . 如图,在正方形
中,
,
分别是
,
的中点,
是
的中点.现在沿
,
及
把这个正方形折成一个空间图形,使
,
,
三点重合,重合后的点记为
.下
列说法错误的是 ①③④ (将符合题意的选项序号填到横线上).
所在平面;②
所在平面;③
所在平面;④
所在平面.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
列说法错误的是 ①③④ (将符合题意的选项序号填到横线上).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10b88a275850602af703cf9fd192e2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d7a248a34854af0de665715f19f692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b1e5953c34b9b6223ceb2beb10f899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca1565cec0a31dabab355090159c6e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/0f319bf6-a6ec-4b0f-8a26-a076d7e78f00.png?resizew=232)
您最近一年使用:0次
2019-12-10更新
|
184次组卷
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14卷引用:河北省定州中学2018届高三上学期期中考试数学试题
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10 . 对于样本相关系数,下列说法错误的是( )
A.样本相关系数可以用来判断成对样本数据相关的正负性 |
B.样本相关系数可以是正的,也可以是负的 |
C.样本相关系数![]() |
D.样本相关系数越大,成对样本数据的线性相关程度也越强 |
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