问题 解答题
(1+
1
2
)(1-
1
2
)(1+
1
22
)(1+
1
24
)(1+
1
28
)(1+
1
216
)
答案

原式=(1-

1
22
)(1+
1
22
)(1+
1
24
)(1+
1
28
)(1+
1
216

=(1-

1
24
)(1+
1
24
)(1+
1
28
)(1+
1
216

=(1-

1
28
)(1+
1
28
)(1+
1
216

=(1-

1
216
)(1+
1
216

=1-

1
232

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