解题方法
1 . 设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd9b0ef13553b91e4e2878ac15345c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874bc8ac1ba02e54bcc5691478b28dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd9b0ef13553b91e4e2878ac15345c.png)
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2021-03-22更新
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2卷引用:2023年上海市学业水平合格性考试【考前模拟卷02】数学试题