问题
解答题
计算:
|
答案
原式=(1-
)+(1 2
-1 2
)+(1 4
-1 4
)+1 8
+(1 31
-1 31
)+(1 62
-1 62
)+(1 124
-1 124
)+(1 248
-1 248
),1 496
=1-
+1 8
+1 31
-1 31
,1 496
=
+7 8
×(2-1 31
)=1 16
+7 8
×1 31
,31 16
=
+7 8
=1 16
.15 16
故答案为:
.15 16