ln[(1+1/n^2)*(1+2/n^2)*(1+3/n^2)*(1+4/n^2)……(1+n/n^2)]=ln(1+1/n^2)+ln(1+2/n^2)+ln(1+3/n^2)+ln(1+4/n^2)+……+ln(1+n/n^2)=(1/n^2)ln{(1+1/n^2)^(n^2)}+(2/n^2)ln{[1+1/(n^2/2)]^(n^2/2)}+……+(n/n^2)ln{[1+...
求大神帮助 (1+1/n^2)*(1+2/n^2))*(1+3/n^2))*(1+4/n^2)````(1+n/n^2)
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