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(1998•丽水)(1)计算:;(2)化简:.
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(1998•丽水)(1)计算:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHIAAAAjCAYAAABID14vAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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==
)
;
(2)化简:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAD4AAAAkCAYAAADRjIm5AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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==
)
.
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![](https://img.xintiku.com/upload/46/9c/469c30d52f5aa8cb95ba14476959500d.png)
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![](https://img.xintiku.com/upload/da/8a/da8ab508a819ab6ac4d5b04cf6ae5549.png)
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的值为零,则
=________.
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(1998•丽水)解方程: