(1)已知:
,求
的值.
(2)已知
为正整数,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4857c3822a3e07b56e4c06692909cfb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4771bad2795b80dacbf633763de97c.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab0127a08fcdea5e8d0b4ef97fcfde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/972361b4139004cd001a55f7c402ae6b.png)
更新时间:2023-04-07 15:04:20
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【推荐1】已知x的绝对值是3,a、b互为倒数,c、d互为相反数,m是最大的负整数,试求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2591ab6d9eca3c056fb2ef5a56598fd7.png)
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【推荐2】已知|x|=7,|y|=12,求代数式x+y的值.
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【推荐1】你能求
的值吗?遇到这样的问题,我们可以先思考一下,从简单的情形入手,先分别计算下列各式的值.
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593f8180e11af0dc81621f87aabb1039.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0b0e0199421985f1d73fa08c43f3b2.png)
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffcaa264cb72b8d982795c24dbaf4952.png)
…
(1)由此我们可以得到:
.
(2)请你利用上面的结论,再完成下面两题的计算:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a52e30acd1840ce6d68e1d91137fd47.png)
②若
求x2020的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2cb34741fe06a3bb780c2ce13ebe5e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593f8180e11af0dc81621f87aabb1039.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0b0e0199421985f1d73fa08c43f3b2.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffcaa264cb72b8d982795c24dbaf4952.png)
…
(1)由此我们可以得到:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaafa43f964a9a466faec320145b4e7d.png)
(2)请你利用上面的结论,再完成下面两题的计算:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a52e30acd1840ce6d68e1d91137fd47.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a9db222486589831a89c14ad559947.png)
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