题目内容
若a+x2=2010,b+x2=2011,c+x2=2012,且abc=24.则
+
+
-
-
-
的值为______.
| a |
| bc |
| b |
| ac |
| c |
| ab |
| 1 |
| a |
| 1 |
| b |
| 1 |
| c |
∵a+x2=2010,b+x2=2011,c+x2=2012,
∴2010-a=2011-b=2012-c,
∴b=a+1,c=a+2,又abc=24,
则
+
+
-
-
-
=
-
=
=
=
=
.
故答案为:
.
∴2010-a=2011-b=2012-c,
∴b=a+1,c=a+2,又abc=24,
则
| a |
| bc |
| b |
| ac |
| c |
| ab |
| 1 |
| a |
| 1 |
| b |
| 1 |
| c |
=
| a2+b2+c2 |
| abc |
| bc+ac+ab |
| abc |
=
| a2+b2+c2-bc-ac-ab |
| abc |
=
| a2+(a+1)2+(a+2)2-(a+1)(a+2)-a(a+2)-a(a+1) |
| 24 |
=
| 3 |
| 24 |
| 1 |
| 8 |
故答案为:
| 1 |
| 8 |
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