题目内容
计算
(1)(0.25)
+(
)
-625
(2)log2(47×25)
(1)(0.25)
| 1 |
| 2 |
| 1 |
| 27 |
| 1 |
| 3 |
| 1 |
| 4 |
(2)log2(47×25)
解;(1)(0.25)
+(
)
-625
=(
)
+(
)3×
-(54)
=
+
-5=-
.
(2)log2(47×25)=log247+log225=7log24+5=7×2+5=19.
| 1 |
| 2 |
| 1 |
| 27 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
| 25 |
| 6 |
(2)log2(47×25)=log247+log225=7log24+5=7×2+5=19.
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