题型:解答题-问答题
难度:0.65
引用次数:88
题号:17939198
先阅读下面例题的解题过程,再解决后面的题目.
例题:已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8feebc75bea5796c43309058866f51.png)
求:
的值.
解:由:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8feebc75bea5796c43309058866f51.png)
得:
,
即:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8589fe1799c7543a35d6235eea8dce5.png)
所以:
,
所以:
.
题目:已知
求:
的值.
例题:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8feebc75bea5796c43309058866f51.png)
求:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22de34677e159edc650d5541bc27cd3.png)
解:由:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8feebc75bea5796c43309058866f51.png)
得:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edb8341da57d8ca6836ceee1807fe86.png)
即:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8589fe1799c7543a35d6235eea8dce5.png)
所以:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da47b7f2e356c49c1560f90d7307e62f.png)
所以:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8caf81c871aea1b6198ef3d70475110f.png)
题目:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50cf246bf76775d34f721dba001ab43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ac3225ba53aa97230901b3af5d3cd3.png)
更新时间:2023-01-21 13:42:20
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【知识点】 已知式子的值,求代数式的值解读
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