若有理数
、
使得
,
,
,
这四个数中的三个数相等,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3a6604dedcd08eb820b6aadfaa28e8.png)
__________ .
![](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/b88584cf1df43e28d03592c7998b1653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059d6df06a5b85848dc4fa33327f8e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7bf9200b351a259ddfc6c0266129d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3a6604dedcd08eb820b6aadfaa28e8.png)
22-23七年级上·河南商丘·期中 查看更多[3]
河南省商丘市博雅学校2022-2023学年七年级上学期期中数学试题河南省许昌市2022-2023学年七年级上学期期中数学试题(已下线)第5.1—7.2章期中复习试卷(培优卷)-2022-2023学年七年级数学下册同步精品课堂(人教版)
更新时间:2022-12-11 17:10:49
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【推荐2】已知
,
,
的大小关系如图所示,则下列各式:①
;②
;③
;④
;⑤
.其中正确的是____ .(请填写序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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![](https://img.xkw.com/dksih/QBM/2020/3/18/2422047199854592/2422257521786880/STEM/16ac0995-a521-4884-9522-e0212a6d1a22.png)
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【推荐2】如图,在平面直角坐标系中,点
、
,点
在
轴上运动,点
在直线
上运动,则四边形
周长的最小值是______ .
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【推荐1】各数位上的数字均不相等的两位数称为好数,
是由两个好数组成的有序数对,将
的各位数字中最大的数作为千位数字,将
的各位数字中最小的数作为百位数字,将
的各位数字中最小的数作为十位数字,将
的各位数字中最大的数作为个位数字,这样构成了一个新的四位数
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的衍生数,若此时
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,
,
,
),记
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的衍生数为
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(
、
为整数,
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______ .
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【推荐2】已知
,
.
(1)当
时,化简:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06cf8c8d951aa07cd70e0e737a0c03d2.png)
___________ .
(2)若
的值与x的值无关,则代数式
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55dc03a65aaf6fb88f19592ba8d65e95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8872c03be43ebbfad5665a21e1bb07.png)
(1)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06cf8c8d951aa07cd70e0e737a0c03d2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc629a3827fd607ce575090501d9cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc629a3827fd607ce575090501d9cf.png)
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