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解题方法
1 . 已知
,
.
(1)①求
的值;
②当
时,求
;
(2)当
时,求
的解析式;
(3)求方程
的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fb2218035d9e90971591b4caaf998e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc64ef35f71f4a7063ad4276ec8175ed.png)
(1)①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fef7672c5d8d64d61cecb70bcf615e0.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a31f7a8c150b3f4e720db0401fd5fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(3)求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bdc7e3bd00f33a235fc7d5c77a11f62.png)
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