The sum of the series 3.6 + 4.7 + 5.8 + ......upto (n - 2) terms

1.	The sum of the series 3.6 + 4.7 + 5.8 + ......upto (n - 2) terms
A.	\[{{n}^{3}}+{{n}^{2}}+n+2\]
B.	\[\frac{1}{6}(2{{n}^{3}}+12{{n}^{2}}+10\,n-84)\]
C.	\[{{n}^{3}}+{{n}^{2}}+n\]
D.	None of these
Answer» C. \[{{n}^{3}}+{{n}^{2}}+n\]

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The sum of the series 3.6 + 4.7 + 5.8 + ......upto (n - 2) terms

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