用适当的方法解下列方程.
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e1d7555b12799e76f3ee2032f7748b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc49025ac7e1d4c0ab7614f528333e28.png)
更新时间:2024-05-14 15:29:02
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解答题-计算题
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【推荐2】对于有理数a、b定义一种新运算“
”,规定a
b=|a|+|b|﹣|a﹣b|.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/832f3b58-0729-4b3f-b92b-b546ef5a82a2.png?resizew=279)
(1)计算2
3的值;
(2)当a、b在数轴上的位置如图所示时,化简a
b;
(3)已知a<0,a
a=12+a,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/832f3b58-0729-4b3f-b92b-b546ef5a82a2.png?resizew=279)
(1)计算2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
(2)当a、b在数轴上的位置如图所示时,化简a
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
(3)已知a<0,a
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
【推荐1】在线段
上找一个点
,
把
分为
和
两段,其中
是较小的一段,先要使
,为了简单起见,设
,
,则
.求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e76672bd62408d12be32ff14c2a8d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d7c1cc4d5b14e3d77ec6ac80f65d7fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53787c48ad7fc304452cc84007a07c13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/c56d9fa8-d11d-4201-923e-28d15e4749ff.png?resizew=280)
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