123456's submissions for 1058 求级数的第N项

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123456
on Sept. 29, 2011, 8:30 p.m.
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164.00 KB
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IR | C
123456
on Sept. 29, 2011, 8:29 p.m.
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IR | C
123456
on Sept. 29, 2011, 8:28 p.m.
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