Which of the following represents the general term of the sequence 2 1 3 5 6 12 20 30 42 56 7 9 ? 11 13 A. (-1)+1 n(n+1) P B. (-1)+1(n+1) n C. (-1)+1²+1 D. (-1)+1²+1 28-1 E. (-1)+1 2n-1 F. (-1)+1+1

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