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Statement -1: sum(r=0)^(n) r(""^(n)C(r)...

Statement -1: ` sum_(r=0)^(n) r(""^(n)C_(r))^(2) = n (""^(2n -1)C_(n-1))`
Statement-2: ` sum_(r=0)^(n) (""^(n)C_(r))^(2)= ""^(2n)C_(n)`

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