1 . 有下列说法:①
是单项式;②几个数相乘,积的符号由负因数的个数决定,当负因数的个数是偶数个时积为正;③若x=﹣1是方程3x﹣m=0的解,则m=3;④1﹣(ab+1)2的最大值为1;⑤长方形硬纸片绕它的一边旋转,形成一个圆柱体,这可以说面动成体.其中正确说法的序号是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c943d7b6ce65c70e98d62e3664168ab.png)
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2 . 已知关于x的方程
的解是非负数,则k的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b215e7a0ffcd3676f034ef701eb1886.png)
您最近一年使用:0次
2024-05-14更新
|
482次组卷
|
4卷引用:期末押题卷02-【好题汇编】备战2023-2024学年七年级数学下学期期末真题分类汇编(山东专用)
(已下线)期末押题卷02-【好题汇编】备战2023-2024学年七年级数学下学期期末真题分类汇编(山东专用)(已下线)暑假作业08 一元一次不等式(知识梳理+五大题型专练+能力拓展练)-【暑假分层作业】2024年七年级数学暑假培优练(人教版) 山东省聊城市临清市2023-2024学年八年级下学期期中考试数学试题山东省聊城市东阿县2023-2024学年八年级下学期期中数学试题
3 . 从
,
,
三个数中任意取两个数相加再减去第三个数,根据不同的选择得到三个结果
,
,
称为一次操作.下列说法:
①若
,
,
,则
,
,
三个数中最大的数是7;
②若
,
,
,且
,
,
中最小值为
,则
或9;
③给定
,
,
三个数,将第一次操作的三个结果
,
,
按上述方法再进行一次操作,得到三个结果
,
,
,以此类推,第
次操作的结果是
,
,
,则
的值为定值.其中正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad076ddb746eb6510a3599eca5a5287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d71f015144ffaf1faec94a259b4a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36db71b85dad40dad1e422f2cc41c2ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
③给定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79b9eaa5e7ab7a1e5c512b571914dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9dc4e868a310c371ff88075d8a966a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25a31c5f2bbe6a2f6bdef22f43c61620.png)
A.3 | B.2 | C.1 | D.0 |
您最近一年使用:0次
名校
4 . 已知
均为整数,且
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2054d2c0403eb83c9f6fcbf6cbe67c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
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5 . 一般地,点
在数轴上分别表示有理数
,那么
之间的距离可表示为
.如:
表示5在数轴上的对应点到原点的距离,
.求
的最小值为______ ,若满足
时,则
的值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13880b9454c5942f164d934b1834783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70686e860c2c1f61928cd70546e16ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2a1e3836d402dfd0a33c0afa968a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c70b9da66c0c5e4056c81a5df66cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21199b911613ddbc5e84ecb4a2b729fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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6 . 观察下列每对数在数轴上的对应点间的距离4与
,3与5.并回答下列各题:
(1)你能发现:3与5在数轴上的对应点间的距离可以表示为:
;4与
在数轴上的对应点间的距离可以表示为:
;根据以上规律,则
与
在数轴上的对应点的距离是 .
(2)若数轴上的点A表示的数是x,点B表示的数是
,则A 与B两点间的距离可以表示为 .
(3)结合数轴,求得
的最小值为 ;
(4)满足
,则x的值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/243f5575-30b8-4d0e-9c3d-f184cb8d83b0.png?resizew=356)
(1)你能发现:3与5在数轴上的对应点间的距离可以表示为:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd529494cfd2a4700e84c13b25db0f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846b357b9e63a3627aca880cd0a40b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
(2)若数轴上的点A表示的数是x,点B表示的数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(3)结合数轴,求得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13cf6f34ceecab7d47400dd3d0e247c.png)
(4)满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ce110b52b8ee0f943a481e7619830b.png)
您最近一年使用:0次
2023-09-24更新
|
73次组卷
|
3卷引用:河南省洛阳市2023-2024学年七年级上学期期中数学试题
名校
7 . 若关于x的方程
是一元一次方程,且方程的解为
.根据条件,判断下列说法正确的有_____ .
①一组按规律排列的数:
,
,
,
,
,第n个数可归纳为
;
②代数式
的最小值为4;
③若
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77849bcb409bfbda76dfd011598be4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9681e378ccdd39fea68801dd0571b8b3.png)
①一组按规律排列的数:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fae5316b075ca2cd43e017b62bebe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66081d838f981c23e77ad36e69cfc546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9553b4a5d1a2b1e7effe6c9f8d1ede06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00f1f2326bc245cdd10b79acb02542db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8950a3dcab68fe125fd704048a5c4a71.png)
②代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76301c61484c87ffb805700231cf727.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d3f294cd1ef098e7bd6a123cb22f4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ada685f01a02d2a742770b9e8f6be1.png)
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名校
8 . 已知
,则下列说法:
①若
,则
;
②若
的值与
的取值无关,则
;
③当
时,若
,则
或
;
④当
时,
有最小值为7,则
.
其中正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663d72d9951833efb14aec843bca208a.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20e1c681b27df538bd4742f6cd8298ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452ec2a5f08bb746727494536710d115.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97297e52bd89d7f28e039136c67f76aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991501c6225bb57817b2a7de4059cdd0.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff4b08995815b1bcba83e12a9aec4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e46f0b44a7615eb80daa83a378b42da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e97e13943f641fa99ab474f3fac4f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c716601286ac3ef51a4c3c16b12e260.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0d09c61ed9d7289d948d2ab559657f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1efcbe82761bee80989e0589a260aff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c35bd7d260ed2de03885bdd2a03fde36.png)
其中正确的个数是( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2023-10-07更新
|
611次组卷
|
6卷引用:山东省德州市陵城区2023-2024学年七年级上学期期中数学试题
9 . 先阅读,后探究相关的问题
【阅读】
表示
与
差的绝对值,也可理解为
与
两数在数轴上所对应的两点之间的距离;
可以看作
,表示
与
的差的绝对值,也可理解为
与
两数在数轴上所对应的两点之间的距离.
(1)如图,先在数轴上画出表示点
的相反数的点
,再把点
向左移动
个单位,得到点
,则点
和点
表示的数分别为 和 ,
,
两点间的距离是 ;
(2)数轴上表示
和
的两点
和
之间的距离表示为 ;如果
,那么
为 ;
(3)若点
表示的整数为
,则当
为 时,
与
的值相等;
(4)要使代数式
取最小值时,相应的
的整数取值有 个.
【阅读】
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9f22e0bb3333b34e25dc044351e7f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bf8dd39e95e7d1187e7ba68dc9027d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7ba690de4bdbdceb968265181a208f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/5/c3e8be5a-e3c3-4edc-8da7-5ecd26bb441b.png?resizew=180)
(1)如图,先在数轴上画出表示点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212d6e1f4d7dcc0e5e902c46e3b1dfcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8f58755aee89fb2cf72ba518dcee2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)数轴上表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368fc197b61e01fe6a4a168bb7b375cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c323e480640e140b3360668db6e7898f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b4feb90b84eb54fe644c596f5156a1.png)
(4)要使代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5bdbfa6451f4db598a8877e825d1e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
10 . 定义:对于任意两个不相等的有理数a,b,计算:
,
,所得结果的最小值称为a,b的“关联差”.例如:
,2.因为
,
,所以
,2的“关联差”为
.
(1)3,
的“关联差”为______;
(2)
,8的“关联差”与8,
的“关联差”有何关系,请说明理由;
(3)当2,
的“关联差”为
时,求x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408797c93778702f193d9062fb928538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da2a94228bc58445e2f9aee4c0627573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10cc0d574b82b084d7c39c28b295627.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92d7bb7fc7d89d3598d7ed85f4146b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
(1)3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01317332a203c898536b1d0459f51d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01317332a203c898536b1d0459f51d23.png)
(3)当2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbd7bf765eb3b6952cf97be50992c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
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