1 . 不等式
的解集是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814c747879a27413d438579f36abe37d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
2 . 若关于x的方程3x+2m=2的解是正数,则m的取值范围是( )
A.m![]() | B.m![]() | C.m≥1 | D.m≤1 |
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2020-10-10更新
|
443次组卷
|
5卷引用:山东省聊城市临清市、东阿县2021-2022学年八年级下学期期末数学试题
3 . (1)解不等式
,并在数轴上表示解集.
(2)解不等式组:
,并写出该不等式组的整数解.
(3)解不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e820c751db06fa26018548ce66db22d4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/28/3f6a0213-f658-41ee-9457-f6a272e44596.png?resizew=266)
(2)解不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc24df288227ffc7091f688b9c69ff4c.png)
(3)解不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7468c31d84a1acbd89b44f23e53e9442.png)
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4 . 某陶瓷公司生产茶壶和茶碗,一号窑炉每天生产
把茶壶或和生产
个茶碗;二号窑炉每天生产
把茶壶或生产
个茶碗.为了保证受热均匀,在一天当中,每个窑炉只生产茶壶或只生产茶碗.已知每把茶壶配
个茶碗为一套茶具,每月按
天计算,生产出的茶壶和茶碗正好配套,设一号窑炉生产茶壶
天,二号窑炉生产茶壶
天.
(1)请你求出
与
之间的函数关系式;
(2)设两个窑炉每月生产
套茶具.
①试求出
与
之间的函数关系式;
②当
为何值时,
取最小值,最小值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ac61206cb12cf6686bb0facf635010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0ef1be99998a0882c25c178a17a09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)请你求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)设两个窑炉每月生产
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①试求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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5 . 若关于
的一元二次方程
有实数根,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5bc28c37b726c2e1bfd6f360fc2f9d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 解不等式
,并把它的解集在如图的数轴上表示出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e7d0ab2f396d0ca06efa8c9f36a5618.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/20/930bade5-399b-4cb0-8aee-84690a9a39cd.jpg?resizew=185)
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7 . 定义一种新运算“
”:当
时,
;当
时,
.若
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3c2f679d53b91088ba6eb14c16cbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39c94a95487eb1f34b20512aff2d9edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cda1c05e84b10dab5f3a05fb83a70a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c43a29a1a6a6c07e723ade7c8724b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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8 . 请写出一个一元一次不等式,使它的解集为
:__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
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9 . 已知关于x的分式方程
的解为正数,则k的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ae6ba8b9e9b44d43ba5cf253f7e9dd.png)
A.![]() | B.![]() ![]() | C.![]() | D.![]() ![]() |
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10 . (1)解不等式
,并把解集在数轴上表示出来.
(2)解方程:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df635d0ff314755e5ab8d57e385ea52.png)
(3)先化简:
,再从
中选一个合适的整数代入求值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ccb9e734fc6ee8a41cb41902ee75ca.png)
(2)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df635d0ff314755e5ab8d57e385ea52.png)
(3)先化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71cf70e8aaa6f46ab18ca18397d8447d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eadba7e0419a9a6eec9b02fae08fa24.png)
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