> 数学 >
1
2
+
1
4
+
1
8
+
1
16
+
1
32
+
1
64
人气:488 ℃ 时间:2020-03-28 01:15:01
解答
方法1:
1
2
+
1
4
+
1
8
+
1
16
+
1
32
+
1
64

=
3
4
+
1
8
+
1
16
+
1
32
+
1
64

=
7
8
+
1
16
+
1
32
+
1
64

=
15
16
+
1
32
+
1
64

=
31
32
+
1
64

=
63
64

方法2:
1
2
+
1
4
+
1
8
+
1
16
+
1
32
+
1
64
=
1
2
1
64
×
1
2
1−
1
2
=
63
64
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