Mean of the numbers \[1,2,3,...,n\] with respective weights \[{{1}^{2}}+1,\,\,{{2}^{2}}+2,\,\,{{3}^{3}}+3,\,\,...{{n}^{2}}+n\] is

Mean of the numbers \[1,2,3,...,n\] with respective weights \[{{1}^{2}

1.	Mean of the numbers \[1,2,3,...,n\] with respective weights \[{{1}^{2}}+1,\,\,{{2}^{2}}+2,\,\,{{3}^{3}}+3,\,\,...{{n}^{2}}+n\] is
A.	\[\frac{3n(n+1)}{2(2n+1)}\]
B.	\[\frac{2n+1}{3}\]
C.	\[\frac{3n+1}{4}\]
D.	\[\frac{3n+1}{2}\]
Answer» D. \[\frac{3n+1}{2}\]

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Mean of the numbers \[1,2,3,...,n\] with respective weights \[{{1}^{2}}+1,\,\,{{2}^{2}}+2,\,\,{{3}^{3}}+3,\,\,...{{n}^{2}}+n\] is

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