Let \[S=\sum\limits_{k=0}^{n-1}{^{k+2}{{P}_{2}},}\] then

1.	Let \[S=\sum\limits_{k=0}^{n-1}{^{k+2}{{P}_{2}},}\] then
A.	n divides 3S
B.	n+1 divides 3S
C.	n+2 divides 3S
D.	All are correct
Answer» E.

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Let \[S=\sum\limits_{k=0}^{n-1}{^{k+2}{{P}_{2}},}\] then

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