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Question Number 125857 by Dwaipayan Shikari last updated on 14/Dec/20
1+4(12)7+7(1.32.4)7+10(1.3.52.4.6)7+...
Answered by Olaf last updated on 14/Dec/20
S=1+∑∞n=1(1+3n)(∏nk=1(2k−1)(2k))7S=1+∑∞n=1(1+3n)(12nn!∏nk=1(2k−1))7S=1+∑∞n=1(1+3n)(12nn!∏nk=1(2k−1)(2k)(2k))7S=1+∑∞n=1(1+3n)((2n)!22nn!2)7Γ(n+12)=(2n)!22nn!πS=1+1π7/2∑∞n=1(1+3n)(Γ(n+12)Γ(n+1))7...tobecontinued...
Commented by Dwaipayan Shikari last updated on 14/Dec/20
Greatsir!
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