(1)已知
,求
的值.
(2)满足
,求
的值.
(3)已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7c4d4982480a69e48bfa5b5869f593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7eb64bd203b20719f3afbc5a834e99.png)
(2)满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867b60cd50ffd72383f1c39cf00b1e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4a1a2a3a3b9d15539501245b48f889.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420f8f5faf14ac8cf8c25d15c19c9265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985924b38b1f2de80b9f0a90cc1cb3d9.png)
更新时间:2019-11-14 07:59:22
|
【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)
名校
【推荐1】计算
(1)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6560526149b8ccea5583edea554503c9.png)
(3)
(4)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ecedb423877d59b23a5192fecd74c0.png)
(5)化简![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d295f1fab6cc24c384f6a6e9da565d.png)
(6)先化简,再求值:
,其中
,
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdade1c766519e88fb99751abc8eb08b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6560526149b8ccea5583edea554503c9.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc57a0c7ced3092fa5c05cb3a77845c.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ecedb423877d59b23a5192fecd74c0.png)
(5)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d295f1fab6cc24c384f6a6e9da565d.png)
(6)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd1042890cb39c33e26accb6208ac7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】【教材呈现】下题是某某版七年级上册数学教材的一道练习:
代数式
的值为8,则代数式
的值为__________.
【阅读理解】小明在做作业时采用整体代入的方法,解答如下:
由题意得
,则有
,
所以![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff813078b81de2e02de88559f86d666.png)
所以代数式
的值为
.
【解决问题】请运用小明的方法解决下列问题:
(1)若代数式
的值为2,求代数式
的值;
(2)当
时,代数式
的值为9,当
时,求代数式
的值;
【拓展应用】
(3)若
,
,则代数式
的值为__________.
代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ed328f4a3fc83046eb35c8ffc0fecd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36518fab86f0f8013a96dd672d644b2f.png)
【阅读理解】小明在做作业时采用整体代入的方法,解答如下:
由题意得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa6df0290d57baf826f5be98c0e7176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14072f416224c873070496f6537a1e1b.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff813078b81de2e02de88559f86d666.png)
所以代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36518fab86f0f8013a96dd672d644b2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a94acdfb41489d5694b5a64b9e99754.png)
【解决问题】请运用小明的方法解决下列问题:
(1)若代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b0c4e284c862e67d6f03489ccebaf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165310565d6660b7d86327f4f4e4af53.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e37f58805d211475bd707f8ce4f1c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a9620be4e9083fabe5a03b828478f2.png)
【拓展应用】
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc38f29fe4b470eeaef246140dac721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61494dc2c250e2fb5410f899ed79e88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0747de747cc8c3a46601628100cb881.png)
您最近一年使用:0次