规定两个非零数a,b之间的一种运算,记作
:如果
,那么
.
例如:因为
,所以
;因为
,所以
.根据上述规定,解答下列问题:
(1)填空:
_______,
________;
(2)已知
,求实数x的值;
(3)求证:对任意不等于零的实数p,m,n,总有
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958bd270a90b9fbe73d2951b97a2d3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dcc663396b89986bde86b10a38dee8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60274150b1a72291e36980d26a2d6d9a.png)
例如:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feae878a430a1b23774127547d842cb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5af5855d5a16938c3b63b6cf5229c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34a5b381c8851b6af78605440f1aa1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cb2a175fc8af08cddce9b5630ac2834.png)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5008b7fba97bef425d4fead2eec49027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6104071c5cc972204837571612b45479.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97b60935c4cf93358216def6ef8d7a6.png)
(3)求证:对任意不等于零的实数p,m,n,总有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be8f519c8f9f0da857b52a22413581a.png)
22-23七年级下·全国·期中 查看更多[1]
(已下线)压轴题专训30题(第五、六、七章)-2022-2023学年七年级数学下学期期中期末考点大串讲(人教版)
更新时间:2023-04-07 18:56:43
|
相似题推荐
解答题-计算题
|
适中
(0.65)
【推荐1】我们知道,通过观察、分析、猜想、验证、归纳等活动,用从特殊到一般的数学思想方法,可以帮助我们解决很多问题.
(1)认真填空,仔细观察.
因为
,所以
个位上的数字是
;
因为
,所以
个位上的数字是
;
因为
,所以
个位上的数字是
;
因为
_,所以
个位上的数字是_;
类似的,
个位上的数字是_;
个位上的数字是_;
(2)已知:有代数式
,
,且
,
,若
与
个位上的数字互为相反数,先化简,再求
的值.
(1)认真填空,仔细观察.
因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/573cde866a43fa16637ef90f30f66dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78697a69758b8d469a74236859514a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3195d9cd84a4d06ef1a6eb6bc026bdf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ad4668cc927e277289b2af718f0d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feae878a430a1b23774127547d842cb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6648bc986a558fa32e752d28d3a68431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595a6860d27a5789e6f38eaae8284a28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa6ec171ea9f8e9be9bf13baea05cd8.png)
类似的,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/955079ed2708734e50394387cf40c111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed76985f3bec401fc8767c1759037392.png)
(2)已知:有代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f30adaaa27249ef4d01db422c9b5559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95648414e4a60a55d885d89b37d1229d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e4ae7cfe4ec9b923c0698bccf16840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97297e52bd89d7f28e039136c67f76aa.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】规定两数a,b之间的一种运算,记作
;如果
,那么
.
例如:因为
,所以
.
(1)根据上述规定,填空:
①
______;
;
②若
,
,
,直接写出a,b,c之间满足的数量关系:______;
(2)若
,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d74fb8a902e0cbb2a35fc8e364ba069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5557da9a3fa0e05492df7aaa875171f8.png)
例如:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feae878a430a1b23774127547d842cb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65cb415188aa68a3e30b6def86f2d74.png)
(1)根据上述规定,填空:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f6dce1c14eff5d00fa3ed99658130e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b406d8f7e9a644de8a1692f3973df266.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f17bc2a821a22eac911278e2ca29d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c75ad74d602f789a2b8d8a54154474f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513173b93cc3526d4fe7efc7c7cc1491.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1b56788f5e6e2deafdfba5c997f941.png)
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