19-20八年级下·浙江·期末
1 . 计算
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3db43f764803682651cb99396c18df3.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f0fb5a686dd4e8ca29e07ce418f68c7.png)
您最近一年使用:0次
19-20八年级下·浙江·期末
2 . 计算:
(1)
(2)
(3)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c165b93908968cb85d2695ffcc1771.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f04dd3592f8ddf875fc1a6406f4c1e.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de87a618403a3bb141f26c18e6d08186.png)
您最近一年使用:0次
3 . 定义:若一个三角形两边的平方差等于第三边上高的平方,则称这个三角形为勾股高三角形,这两边的交点称为勾股顶点.
(1) 如图①,已知△ABC 为勾股高三角形,其中A为勾股顶点,AD是BC边上的高.若BD=1,CD=2,求高AD的长;
(2) 如图②,△ABC 中,AB=AC=3,BC=
,求证:△ABC 是勾股高三角形.
(1) 如图①,已知△ABC 为勾股高三角形,其中A为勾股顶点,AD是BC边上的高.若BD=1,CD=2,求高AD的长;
(2) 如图②,△ABC 中,AB=AC=3,BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b65ff50cea1462ed3b68acee18c2de7.png)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651415568678912/2662666230235136/STEM/88150ab2-435c-46e4-af7c-778b569851c3.png)
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4 . (1)化简: ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636146c9e30e1e3e54ae5d4773805cc.png)
(2)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636146c9e30e1e3e54ae5d4773805cc.png)
(2)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe8eee63e5f364ea54052b792159df3.png)
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19-20八年级下·浙江杭州·期中
5 . (1)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c8872652cd250a91a1b5b6e433c99e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0dfe3f239376d57b079a45a5b0d3b62.png)
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19-20八年级下·浙江杭州·期末
6 . 计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22775b55048225f06627494da4f8288.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22775b55048225f06627494da4f8288.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324d6e7b16e75c74f12dec2f46339d5d.png)
您最近一年使用:0次
7 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4753f4a4456d0df13843b71015bfa14.png)
_____ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d51aa9163cdaa66ce3e5044f9e712f4.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3844da56f055d6ee045b25b00a7414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4753f4a4456d0df13843b71015bfa14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d51aa9163cdaa66ce3e5044f9e712f4.png)
您最近一年使用:0次
2021-02-02更新
|
325次组卷
|
3卷引用:【新东方】初中数学978【2020年】【初二下】
19-20八年级下·浙江杭州·期末
8 . 计算:
(1)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7715aa1a6f722d153fa291485108b020.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300ab0bd4b32a7ef24e3f415625b9c80.png)
您最近一年使用:0次
19-20八年级下·浙江杭州·期末
9 . 计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70bccf6da1ae94a799c28675ff025d4a.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70bccf6da1ae94a799c28675ff025d4a.png)
您最近一年使用:0次