题目内容
已知x-
=1,则
=______.
| 1 |
| x |
| x2 |
| x4+2007x2+1 |
∵x-
=1,
∴x2+
-2=1,
∴x2+
=1+2=3,
=
=
=
.
故应填:
.
| 1 |
| x |
∴x2+
| 1 |
| x2 |
∴x2+
| 1 |
| x2 |
| x2 |
| x4+2007x2+1 |
| 1 | ||
x2+2007+
|
| 1 |
| 2007+3 |
| 1 |
| 2010 |
故应填:
| 1 |
| 2010 |
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相关题目
(易错题)已知x+
=
,则x-
的值是( )
| 1 |
| x |
| 6 |
| 1 |
| x |
A、
| ||
B、-
| ||
C、±
| ||
| D、不能确定 |