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請教一題極限

請教一題極限

計算limnnn+1n+2n+nn1 

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回復 1# eyeready 的帖子

  limnnn+1n+2n+nn1=limn1+n11+n21+nnn1=elimnn1ln1+n1+ln1+n2++ln1+nn=e12lnxdx=eln41=e4

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回復 2# thepiano 的帖子

感謝^ ^!

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