If ( C _ r ) denotes the binomial coefficient ( _ ; ^ n C _ r ) then ( left( -1 right) C _ 0 ^ 2 +2 C _ 1 ^ 2 +5 C _ 2 ^ 2 +......(3n-1) C _ n ^ 2 = quad ) | Suva Ai
If ( C _ r ) denotes the binomial coefficient ( _ ; ^ n C _ r ) then ( left( -1 right) C _ 0 ^ 2 +2 C _ 1 ^ 2 +5 C _ 2 ^ 2 +......(3n-1) C _ n ^ 2 = quad )
1.If Cr denotes the binomial coefficient ;nCr then (−1)C02+2C12+5C22+......(3n−1)Cn2=
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