解方程
(1)2x+1=2﹣x
(2)5﹣3(y﹣
)=3
(3)
+1=
.
(1)2x+1=2﹣x
(2)5﹣3(y﹣
![](https://img.xkw.com/dksih/QBM/2016/3/23/1574186912309248/1574186918330368/STEM/cafca78cf79f4ebd8cedae081707c5ab.png)
(3)
![](https://img.xkw.com/dksih/QBM/2016/3/23/1574186912309248/1574186918330368/STEM/4790f1447fe743139f8971b58933815d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/23/1574186912309248/1574186918330368/STEM/eaa29b85b1814f3796a7810ed85f1cab.png)
更新时间:2016-12-06 11:54:23
|
【知识点】 解一元一次方程(三)——去分母解读
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【推荐2】探索新知:
如图1,射线
在
的内部,图中共有3个角:
和
,若其中有一个角的度数是另一个角度数的两倍,则称射线
是
的“巧分线”
(1)一个角的平分线______这个角的“巧分线”(填“是”或“不是”);
(2)如图2,若
,且射线
是
的“巧分线”,则
______;(用含
的代数式表示);
深入研究:
如图2,若
,且射线
绕点P从
位置开始,以每秒
的速度逆时针旋转,当
与
成
时停止旋转,旋转的时间为t秒.若射线
同时绕点P以每秒
的速度逆时针旋转,并与
同时停止,请求出当射线
是
的“巧分线”时的值.
如图1,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2103a382ff73d76a499dd6ea88e217c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
(1)一个角的平分线______这个角的“巧分线”(填“是”或“不是”);
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a50406992c1eab7e2078e75bbfa3f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9bd176ba109b64d458b415caad13d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
深入研究:
如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911b6deb48f1cfe68191cae91179cc0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e00198e65a7458b37648378234220c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d6cf1e736299e674157aa3ee48d522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee45d1d81d69ca1fd883b47ae2865fa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
![](https://img.xkw.com/dksih/QBM/2021/1/14/2635533800464384/2639511595851776/STEM/722a2f5f-a8a0-4dfc-a0b8-63fdce0bd606.png?resizew=366)
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