> 数学 >
计算:(1−
1
22
)(1−
1
32
)(1−
1
42
)…(1−
1
20042
)(1−
1
20052
)
人气:259 ℃ 时间:2020-01-29 09:19:58
解答
(1−
1
22
)(1−
1
32
)(1−
1
42
)…(1−
1
20042
)(1−
1
20052
)
=
22−1
22
32−1
32
42−1
42
20052−1
20052
=
1
2
×
2006
2005
=
1003
2005
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