如图甲,这是由8个同样大小的立方体组成的魔方,魔方体积为
.
(1)求出这个魔方的棱长.
(2)图甲中阴影部分是一个正方形
,求出阴影部分正方形
的边长.
(3)把正方形
放置在数轴上,如图乙所示,使得点
与数1重合,则
在数轴上表示的数为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68abd5606391e7e6ead79023facb61c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/c51ff60d-b027-4f3f-9b9c-aac222f3153a.png?resizew=267)
(1)求出这个魔方的棱长.
(2)图甲中阴影部分是一个正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)把正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
更新时间:2023-12-14 14:20:58
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【推荐1】在数轴上表示下列各数,并按从小到大的顺序用“ < ”把这些数连结起来.
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解答题-作图题
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【推荐2】画出数轴,在数轴上表示下列各数,并用“<”连接.
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【推荐1】把一个长、宽、高分别为
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【推荐1】数轴上表示
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【推荐2】如图①是由8个同样大小的立方体组成的魔方,体积为8.
(1)求出这个魔方的棱长;
(2)图①中阴影部分是一个正方形
,求出阴影部分的面积及其边长;
(3)把正方形
放到数轴上,如图②,使得点
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/6/35585d5f-69a7-4a1c-b6e7-628f1f41b833.png?resizew=363)
(1)求出这个魔方的棱长;
(2)图①中阴影部分是一个正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)把正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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【推荐1】阅读下列解题过程
例:若代数式
的值是2,求a的取值范围
解:原式
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当
时,原式
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(舍去);
当
时,原式
,符合条件;
当
时,原式
,解得
(舍去).
的取值范围是
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上述解题过程主要运用了分类讨论的方法,请你根据上述理解,解答下列问题:
(1)当
时,化简:
__________.
(2)若
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例:若代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da3ffac75c40b6d509421cce40254405.png)
解:原式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd7c0394eaf0ecb240fb8840bf1c9b.png)
当
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当
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当
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上述解题过程主要运用了分类讨论的方法,请你根据上述理解,解答下列问题:
(1)当
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(2)若
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