题目：
计算或求解：（1）5x2-
| 1 |
| 5 |
（2）64（x-1）3+125=0
（3）
(-
|
| 3 | -8 |
1-(
|
答案
解：（1）5x2-| 1 |
| 5 |
5x2=
| 1 |
| 5 |
x2=
| 1 |
| 25 |
x=±
| 1 |
| 5 |
（2）64 （x-1）x+125=0
64 （x-1）x=-125
（x-1）x=-
| 125 |
| 64 |
x-1=-
| x |
| ||
x-1=-
| 5 |
| 4 |
x=1-
| 5 |
| 4 |
x=-
| 1 |
| 4 |
（x）原式=
| 1 |
| 5 |
|
=
| 1 |
| 5 |
|
=
| 1 |
| 5 |
| x |
| 5 |
=-2
| 2 |
| 5 |
解：（1）5x2-
| 1 |
| 5 |
5x2=
| 1 |
| 5 |
x2=
| 1 |
| 25 |
x=±
| 1 |
| 5 |
（2）64 （x-1）x+125=0
64 （x-1）x=-125
（x-1）x=-
| 125 |
| 64 |
x-1=-
| x |
| ||
x-1=-
| 5 |
| 4 |
x=1-
| 5 |
| 4 |
x=-
| 1 |
| 4 |
（x）原式=
| 1 |
| 5 |
|
=
| 1 |
| 5 |
|
=
| 1 |
| 5 |
| x |
| 5 |
=-2
| 2 |
| 5 |
（2004·长沙）如图是一个数值转换机，若输入的a值为