观察下列各式:
第1个等式:
;
第2个等式:
;
第3个等式:
;
第4个等式:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f782d70309802445202487eee751cbdd.png)
请解答下列问题:
(1)按以上规律列出第5个等式:
;
(2)用含
的代数式表示第
个等式:
为正整数);
(3)求
的值.
第1个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18916d9a31948eb154f400f7c8b46be9.png)
第2个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a8e04dbdbe9689c707189b3eda7de5.png)
第3个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810a1cb52eda29ca09ed9d3b92fcfbab.png)
第4个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7d64cab270f4d8e024ece82aed05a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f782d70309802445202487eee751cbdd.png)
请解答下列问题:
(1)按以上规律列出第5个等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(2)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3231e8510ad0591347ea58faeb675b79.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9edd67e2eb3a2fa6e158a7b10c8cbf.png)
更新时间:2023-01-23 11:23:50
|
【知识点】 与实数运算相关的规律题
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】若a是不为1的有理数,我们把
称为a的伴随数.比如:2的伴随数是
.
(1)求
的伴随数.
(2)若
,
是
的伴随数,
是
的伴随数,…以此类推,
则
______,
______,
______.
(3)若
,
是
的伴随数,
是
的伴随数,…以此类推,则
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33e14c2115a83b0a5b12fe7c26fca68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc1bbcc9a896be3b84d73c3b43a0b60.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57777cc7fd77f6237b5d4a607037493e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】先判断下列等式是否成立,再回答问题.
①
;
②
;
③
.
(1)试猜想
______.
(2)按照上述各式反映的规律,试用含n的式子表示这一规律(n为正整数).
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51beb3591c1db41a5c6ffe056b6e0f1.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94cd1700fa121696e87dfd767f431b2.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5864b1696f94286ed1f679cd08ead9ef.png)
(1)试猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab99bc402442dce79f3ba1a99d626fc5.png)
(2)按照上述各式反映的规律,试用含n的式子表示这一规律(n为正整数).
您最近一年使用:0次