Evaluate:
n + n2 + n3 +... ...+ nn
Limit --------------------------
nāā 1n + 2n + 3n +... ...+ nn
From my previous comment:
The numerator should be:
n * (n^n - 1)/(n-1)
Evaluating the denominator for different values of n leads to Sloane's oeis A031971.
And looking through the notes, there are several approximations for the value of this series.
One is: a(n) is asymptotic to (e/(e - 1))*n^n. - Benoit Cloitre, Dec 17 2003
So taking the numerator as: n * (n^n - 1)/(n-1)
and taking the denominator as: (e/(e - 1))*n^n
Cancel out n/(n-1)
Cancel out (n^n - 1)/n^n
And we have
(e - 1)/e =~ 0.632120558828558
Which is close to my f(10,000) = 0.6322235834032078
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Posted by Larry
on 2023-05-27 14:35:27 |