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積分》 |
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範例 48:級數和Σ1/n2 |
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有關
早在十八世紀時,數學家Euler就知道無窮級數
,關於他那時候的想法,我們可在相關網站得到一些資訊,利用微積分的方法,我們如何求這個級數的和呢?
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《 解答 》 |
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現在,我們利用微積分的方法重新得到此級數和。
用到的觀念只是變數變換:考慮在 ,上積分
另外作變數變換,,得到
所以
積分範圍如下:
令
又因
於是
令
又
於是
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About This
document |
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This document was
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The command line arguments were:
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The translation was initiated by Shu Cheng-chou
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