為什麼這篇無窮級數鄉民發文收入到精華區:因為在無窮級數這個討論話題中,有許多相關的文章在討論,這篇最有參考價值!作者morning3569 (我甘心做一條水草)看板Math標題[微積] 無窮級數斂散性判斷時間Sa...
無窮級數 在
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Severity: Notice
Message: Undefined index: full_name
Filename: ptt/article.php
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Backtrace:
File: /var/www/html/KOL/voice/application/views/ptt/article.php
Line: 75
Function: _error_handler
File: /var/www/html/KOL/voice/application/controllers/Pttpages.php
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Function: require_once
2021-07-11 08:37:44
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∞
Σ (n!n!4^n / (2n)! )
n=1
用 Ratio Test 算出來的極限值是1,無法判斷是收斂還是發散
這題答案是發散
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