[張爸] 級數問題
∞ n^2-n-1
Σ -------
n=1 n!
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05/31 01:12, , 1F
05/31 01:12, 1F
推
05/31 01:51, , 2F
05/31 01:51, 2F
→
05/31 01:56, , 3F
05/31 01:56, 3F
推
05/31 02:02, , 4F
05/31 02:02, 4F
→
05/31 12:36, , 5F
05/31 12:36, 5F
→
05/31 12:56, , 6F
05/31 12:56, 6F
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