find-the-value-of-n-1-n-1-n-2-n-1-we-give-n-1-n-1-n-2-pi-2-6-and-H-n-1-2-1-3-1-n-1-ln-n-s-1-n-s-is-the-constant-number-of-Euler-

Question Number 25962 by abdo imad last updated on 16/Dec/17

f i n d t h e v a l u e o f \sum_{n = 1}^{n =\propto} 1 /_{n^{2} (n + 1)} w e g i v e \sum_{n = 1}^{n =\propto} 1 /_{n} 2 = π^{2} / 6

a n d H_{n} = 1 + 2^{- 1} + 3^{- 1} + \dots + n^{- 1} = l n (n) + s + θ (1 / n)

s i s t h e c o n s t a n t n u m b e r o f E u l e r