计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/710383c7da7b07152f93fccb5394d087.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc7d021befc4f15b152fd20cd1861d4.png)
更新时间:2024-05-15 13:18:29
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解答题-计算题
|
适中
(0.65)
【推荐2】已知实数a,b,c所对应的点在数轴上的位置如图所示.
![](https://img.xkw.com/dksih/QBM/2019/8/20/2272855363248128/2272879185674240/STEM/93a9f42f2c97462dacca1dfce5073cd3.png?resizew=235)
请化简:
![](https://img.xkw.com/dksih/QBM/2019/8/20/2272855363248128/2272879185674240/STEM/93a9f42f2c97462dacca1dfce5073cd3.png?resizew=235)
请化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f3ce1a2f6d4e06eb0e58f47eb781ab.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】在学习了二次根式后,小明同学发现有的二次根式可以写成另一个二次根式的平方的形式.
比如:
.善于动脑的小明继续探究:
当
为正整数时,若
,则有
,所以
,
.
请模仿小明的方法探索并解决下列问题:
(1)当
为正整数时,若
,请用含有
的式子分别表示
,得:
,
;
(2)若
,且
为正整数,求
的值.
(3)计算:
比如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801b2ba9ddd13276fe3d357db153d7b6.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8098d37bc6bf9e687c6743439c815dd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cfe35838be15251b884f43e95f0f7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/508852c2701d3121dba6f2429a67cba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/568f4937dd5f61b0c982d76c950c218c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c470388373f20bebd306191029f5643.png)
请模仿小明的方法探索并解决下列问题:
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8098d37bc6bf9e687c6743439c815dd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056a8d41f56cc5b6f3bfb6571385a656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0877194ab8760f54c35527177b03ff93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b390ce43b35e963f97362b0697a15b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48dc463d4ee8c24872d2e9527535330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0343f24de9a473caebc6ad5ec3cc1e.png)
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