题目内容
当
=1时,代数式1-
+
的值为______.
| 2 |
| x |
| 4 |
| x |
| 4 |
| x2 |
∵(
-1)2=1-
+
,
=1,
∴1-
+
=(1-1)2=0,
故答案为:0.
| 2 |
| x |
| 4 |
| x |
| 4 |
| x2 |
| 2 |
| x |
∴1-
| 4 |
| x |
| 4 |
| x2 |
故答案为:0.
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