题目内容
化简求值:
(1)
;
(2)
(x<6)
(3)a3•
•a
;
(4)27
-3
+16
-(
)-2.
(1)
| 4 | (-2)4 |
(2)
| 3 | (x-6)3 |
(3)a3•
| 3 | a2 |
| 1 |
| 3 |
(4)27
| 1 |
| 6 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 2 |
(1)原式=
=2;
(2)原式=x-6(x<6);
(3)原式=a3+
+
=a4;
(4)原式=(33)
-3
+(24)
-(2-1)-2=3
-3
+23-22=8-4=4.
| 4 | 24 |
(2)原式=x-6(x<6);
(3)原式=a3+
| 2 |
| 3 |
| 1 |
| 3 |
(4)原式=(33)
| 1 |
| 6 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 2 |
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