先化简,再求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba7de0cd164abd4d7b91f6675dc4a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
更新时间:2023-02-27 09:22:38
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【知识点】 整式的加减中的化简求值解读
相似题推荐
解答题-计算题
|
适中
(0.65)
【推荐1】已知
在数轴上的位置如图所示,所对应的点分别为A、B、C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/f0635b41-f797-440b-9245-5be6f1ca34bf.png?resizew=310)
(1)在数轴上表示
的点与表示
的点之间的距离为________;在数轴上表示
的点与表示
的点之间的距离为________;
(2)化简:
;
(3)若
,
的倒数是它本身,
的绝对值的相反数是
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/f0635b41-f797-440b-9245-5be6f1ca34bf.png?resizew=310)
(1)在数轴上表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1932b17b086c5d21fb41064da65ce0cb.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc0f2a77423f5e7ec073b629b76101cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6616da8f7c03dc5d8f1ed993d3cfa25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41400757e105b3c3d4f9c9664c260942.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】(1)化简或计算下列两题:
①已知
,求
的值.
②已知
是关于
的一元一次方程
的解,求
的值.
(2)写出上述①、②题共同体现的数学思想.
①已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15ce60b4e23e3b3d4e6b709b5a0d0e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4abd7921b405c6dd2768fbdff4407120.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b476c1e32d04aeada1753858f4f813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cfd8ae59863e7359d62fc8e2203b2d5.png)
(2)写出上述①、②题共同体现的数学思想.
您最近一年使用:0次