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Statement -2: sum(r=0)^(n) (-1)^( r) ("...

Statement -2: `sum_(r=0)^(n) (-1)^( r) (""^(n)C_(r))/(r+1) = (1)/(n+1)`
Statement-2: ` sum_(r=0)^(n) (-1)^(r) (""^(n)C_(r))/(r+1) x^(r) = (1)/((n+1)x) { 1 - (1 - x)^(n+1)}`

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