解不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b512de98cd13663ad4d8c12b4c0b830.png)
更新时间:2019-08-16 21:30:36
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解答题-计算题
|
适中
(0.65)
【推荐1】阅读材料:
小明在学习二次根式的化简后,遇到了这样一个需要化简的式子:
.该如何化简呢?思考后,他发现
.于是
.善于思考的小明继续探索:当
时(其中a,b,m,n均为正整数),则
.此时,
,
,于是,
.请你仿照小明的方法探索并解决下列问题:
(1)设a,b,m,n均为正整数且
,用含m,n的式子分别表示a,b时,结果是
_______,
_______;
(2)若
,
,
,
,……,以此类推,求
的值.
(3)若a,b,c分别为△ABC的三条边,且a,b,c满足
,判断△ABC的形状,并说明理由.
小明在学习二次根式的化简后,遇到了这样一个需要化简的式子:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f52a49827b10ed69c411a4fc24b7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeced7d700458aeb54878b50d3e0d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480dcc40b76180b3737febc8b55088d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30bc87004438cb6ea8a5e2d9ce5ad9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b7bef256becef5ccd358a5f87d7a23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efab18eaf5760012863f7e45d2f7c563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c470388373f20bebd306191029f5643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a44586947262bf63c5ad1651dd80464.png)
(1)设a,b,m,n均为正整数且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b327f4d04ec60e52ae9812e422ba7528.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/5ba4acaacdebfcd73d6b61785ad6a9cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2700143a4c6857b9e19b3a251571bd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb3edc7345953952ab68956569b4e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1192fb092307575d76b89ba33f5f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58354cd81da173c97072d5846fd9de74.png)
(3)若a,b,c分别为△ABC的三条边,且a,b,c满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4119a3c845096d472ca292aa714b6267.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】完成下列各题:
(1)现有一块长为
宽为
的长方形木板,能否采用如图所示的方式,在这块木板上截出两个面积分别是
和
的正方形木板?为什么?
中,
,
为
的平分线,
为
的外角
的平分线,
,垂足为点E.求证:四边形
是矩形.
(1)现有一块长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb184ab686d799ce94ec5cc489076600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1fe8f5485fc6f1e79e77199b4051a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dcd4615051d193806556c37315c896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d462ac043d1bf39e1f745db67116aff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77647f87f43ee59e5db25a6faf808300.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae3d5543f586b351d59c0ffc26a12cc.png)
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