Recommended Questions
- Prove that (3!)/(2(n+3))=sum(r=0)^n(-1)^r((^n Cr)/(^(r+3)Cr))
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- sum(r=0)^(n) (""^n Cr)^2 =
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- If a(n)=sum(r=0)^(n)(1)/(""^(n)C(r)) then sum(r=0)^(n)(r)/(""^(n)C(r))...
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- Prove that sum(r=0)^n3^r^n Cr=4^n.
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- Prove that sum(r = 0)^n r^2 . Cr = n (n +1).2^(n-2)
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- Prove that sum(r = 0)^n r^3 . Cr = n^2 (n +3).2^(n-3)
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- Prove that sum(r = 1)^n r^3 ((Cr)/(C(r - 1))^2) = (n (n + 1)^2 (n+2))/...
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- sum(r = 0)^(n-1) (Cr)/(Cr + C(r+1)) =
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- sum(r=0)^(r-1) (.^n Cr)/(.^n Cr + .^n C(r+1)) का मान है
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