[張爸] 兩題級數
我自回吧 不過還是多謝L大
∞ 1 1 1 1
Σ-------------->Σ-----------=Σ----------- >Σ--------(exist x s.t. lnx>ln2)
n=1 ln(n^4+1) ln(2n^4) ln2+4lnx 5lnx
so the series is divergent
∞ n+1
Σ--------------
n=2 (nlnn)^2
第一個發第二個收
一時想不出來 幫幫忙吧 XD
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※ 編輯: midarmyman 來自: 140.117.198.78 (06/09 22:37)
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