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A man becomes learned by asking questions.
人的學問,由好問而來。

eyeready 發表於 2016-12-2 17:35

請教一題極限

計算limnnn+1n+2n+n1n 

thepiano 發表於 2016-12-2 18:53

回復 1# eyeready 的帖子

  limnnn+1n+2n+n1n=limn1+n11+n21+nn1n=elimn1nln1+1n+ln1+2n++ln1+nn=e12lnxdx=eln41=e4

eyeready 發表於 2016-12-2 19:11

回復 2# thepiano 的帖子

感謝^ ^!

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