题目内容
计算:(1)
+
;(2)(
)3÷
+
.
| 2a |
| a+1 |
| 2 |
| a+1 |
| pq |
| 2r |
| 2p |
| r2 |
| 1 |
| 2q |
(1)
+
;
=
,
=
,
=2;
(2)(
)3÷
+
,
=
×
+
,
=
+
,
=
.
| 2a |
| a+1 |
| 2 |
| a+1 |
=
| 2a+2 |
| a+1 |
=
| 2(a+1) |
| a+1 |
=2;
(2)(
| pq |
| 2r |
| 2p |
| r2 |
| 1 |
| 2q |
=
| p3q3 |
| 8r3 |
| r2 |
| 2p |
| 1 |
| 2q |
=
| p2q3 |
| 16r |
| 1 |
| 2q |
=
| p2q4+8r |
| 16rq |
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