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plot (n*(log(n^3+1/4)-log(n^3))*((-1)^n)*(n^n+n)^(1/n))/(1-cos(1/(n^(1/2))))
plot (n*(log(n^3+1/4)-log(n^3))*((-1)^n)*(n^n+n)^(1/n))/(1-cos(1/(n^(1/2))))
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