计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e06966dca4f0b400bf134ddd55c10154.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efeafbc0cb8e5524ebdb2694a781656.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f41122b6f95bcabc52815858222c6f.png)
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e06966dca4f0b400bf134ddd55c10154.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efeafbc0cb8e5524ebdb2694a781656.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f41122b6f95bcabc52815858222c6f.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/511034bb1bf4680bdcc5b9b37ccf82ff.png)
更新时间:2024-05-06 23:41:26
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解答题-计算题
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较易
(0.85)
【推荐1】利用乘法公式计算
(1)
;
(2)
;
(3)
;
(4)
(用乘法公式).
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a49c08bc55038d6c01d9e7bb46c7340.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b092c891b2c65bd14a5fe7107d744364.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc26962eaea817a9fb949672e822c15.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373908dbcb1fdf3249cfdba1491e65d1.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】观察下列等式:
第1个等式:
;
第2个等式:
;
第3个等式:
;
第4个等式:
;
第5个等式:
;
……
按照以上规律,解决下列问题:
(1)写出第6个等式: ;
(2)直接写出你猜想的第n个等式,并证明该等式.(用含字母n的式子表示等式)
第1个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5723b20d45295e72e35da8920e0afaa3.png)
第2个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9377918f272e505241fe29966126d7e.png)
第3个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc0b33b732227813d04d3b97603b2cab.png)
第4个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6b630f7f7b9e35583447f31181b75e1.png)
第5个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b201a9227c75c1927003586ee70ca44c.png)
……
按照以上规律,解决下列问题:
(1)写出第6个等式: ;
(2)直接写出你猜想的第n个等式,并证明该等式.(用含字母n的式子表示等式)
您最近一年使用:0次