1+1/2+1/4+1/8+1/16+1/32+1/64.
问题描述:
1+
+1 2
+1 4
+1 8
+1 16
+1 32
. 1 64
答
1+
+1 2
+1 4
+1 8
+1 16
+1 32
,1 64
=1+(1-
)+(1 2
-1 2
)+(1 4
-1 4
)+(1 8
-1 8
)+(1 16
-1 16
)+(1 32
-1 32
),1 64
=1+1-
,1 64
=1+
,63 64
=1
.63 64