题目内容

(1+
1
2
)(1-
1
2
)(1+
1
22
)(1+
1
24
)(1+
1
28
)(1+
1
216
)
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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