题目内容
(1)计算:
-(-2010)0+(
)-1+|
-1|;
(2)若a=
+
,b=
-
,求a2b+ab2的值.
| 12 |
| 1 |
| 2 |
| 3 |
(2)若a=
| 5 |
| 3 |
| 5 |
| 3 |
(1)原式=2
-1+2+
-1
=3
;
(2)∵a=
+
,b=
-
,
∴a+b=a=
+
+
-
=2
,
ab=(
+
)(
-
)=5-3=2,
∴a2b+ab2=ab(a+b)=2
×2=4
.
| 3 |
| 3 |
=3
| 3 |
(2)∵a=
| 5 |
| 3 |
| 5 |
| 3 |
∴a+b=a=
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
ab=(
| 5 |
| 3 |
| 5 |
| 3 |
∴a2b+ab2=ab(a+b)=2
| 5 |
| 5 |
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