已知
,则代数式
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e2a1938ce3743d2a836f5b14e06983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1808c0fdc9e929b2e62720186c222ece.png)
A.![]() | B.2 | C.3 | D.![]() |
更新时间:2024-04-18 21:09:17
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【推荐1】若m,n是方程x2-x-2 022=0的两个根,则代数式(m2-2m-2 022)(-n2+2n+2 022)的值为( )
A.2 023 | B.2 022 | C.2 021 | D.2 020 |
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(0.65)
【推荐1】如图,有三张正方形纸片
,
,
,它们的边长分别为
,
,
,将三张纸片按图
,图
两种不同方式放置于同一长方形中,记图
中阴影部分周长为
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,图
中阴影部分周长为
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,若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】在矩形
内,将两张边长分别为
和
的正方形纸片按图1,图2两种方式放置(图1,图2中两张正方形纸片均有部分重叠),矩形中未被这两张正方形纸片覆盖的部分用阴影表示,设图1中阴影部分的面积为
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![](https://img.xkw.com/dksih/QBM/2021/5/31/2733074619572224/2733439647662080/STEM/e38a6dd8ca2e4b9b92331b6c16a3d7e3.png?resizew=401)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ae89bd2dd0a18e1afb5b1a1abd0efd.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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