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Grade:

                        

C1/C0 + 2C1/C2 + 3C3/C2 + …..+ nCn/Cn-1 = n(n+1)/2 prove this when C1,C2,C3......Cn represents the coefficients of (1+x)^n.

2 years ago

Answers : (1)

Arun
24742 Points
							
Dear Meghendra
 
Its general term = r * nCr / nCr-1
 
hence
 
r * (n – r + 1 )/ r
 
n – r + 1
 
now after summation you get = n (n + 1)/2
 
Regards
Arun
2 years ago
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