If kSn is defined to be the product of (n+k)(n-k+1) for all positive integers k and n,which of the following expressions repressents (k+1)Sn+1?


(n+k)(n-k+2)

(n+k)(n-k+3)

(n+k+1)(n-k+2)

(n+k+2)(n-k+1)

(n+k+2)(n-k+3)

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GMATAdvanced-PS