[中學] 級數和
k=9
Σ (-1)^k / k^2 = ______
k=1
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02/29 21:39, , 1F
02/29 21:39, 1F
→
02/29 21:52, , 2F
02/29 21:52, 2F
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02/29 21:52, , 3F
02/29 21:52, 3F
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02/29 21:54, , 4F
02/29 21:54, 4F
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02/29 21:57, , 5F
02/29 21:57, 5F
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02/29 22:00, , 6F
02/29 22:00, 6F
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