问题
解答题
计算 (1)(0.25)
(2)log2(47×25) |
答案
解;(1)(0.25)
+(1 2
)1 27
-6251 3
=(1 4
)1 4
+(1 2
)3×1 3
-(54)1 3
=1 4
+1 2
-5=-1 3
.25 6
(2)log2(47×25)=log247+log225=7log24+5=7×2+5=19.
计算 (1)(0.25)
(2)log2(47×25) |
解;(1)(0.25)
+(1 2
)1 27
-6251 3
=(1 4
)1 4
+(1 2
)3×1 3
-(54)1 3
=1 4
+1 2
-5=-1 3
.25 6
(2)log2(47×25)=log247+log225=7log24+5=7×2+5=19.