已知实数
、
在数轴上的对应点如图所示,化简:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c33780ccb9642be7e2a23395293f4041.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c33780ccb9642be7e2a23395293f4041.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/0b07a90b-0ff4-4ab3-8c34-2a345c1d5929.png?resizew=284)
更新时间:2021-05-25 08:40:06
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【推荐1】如图,直角三角形AOB的直角边OA在数轴上,AB与数轴垂直,点O与数轴原点重合,点A表示的实数是2,BA=2,以点O为圆心,OB的长为半径画弧,与数轴交于点C,则点C对应的数是_____ .
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897667117563904/2898690968166400/STEM/4321ef62-d6db-41e4-bee0-91c537c845bb.png?resizew=189)
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【推荐2】(1)在数轴上离原点距离是
的点表示的数是_______ ;
(2)若
,则
的值是______ ;
(3)
的相反数是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc191eec8eac0006a9e26d46ebb18b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b55833c1831ad7e0158c5e49dd7d24e.png)
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【推荐1】下面是一个按某种规律排列的数阵:
根据数阵排列的规律,第五行的最后一个数是________ ;第
(
为整数且
)行从左向右数第
个数是______________ (用含
的代数式表示)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/d8ee7c80-6ccc-485b-8034-ea7ff5f0bb78.png?resizew=535)
根据数阵排列的规律,第五行的最后一个数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c401203f734047bf94e0395257bc492f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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