The sum of the series \[3.6+4.7+5.8+........\]upto \[(n-2)\] terms [EAMCET 1980]

\[\frac{1}{6}(2{{n}^{3}}+12{{n}^{2}}+10n-84)\]

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

1.	The sum of the series \[3.6+4.7+5.8+........\]upto \[(n-2)\] terms [EAMCET 1980]
A.	\[{{n}^{3}}+{{n}^{2}}+n+2\]
B.	\[\frac{1}{6}(2{{n}^{3}}+12{{n}^{2}}+10n-84)\]
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 [EAMCET 1980]

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