The sum of the series \[1+3x+6{{x}^{2}}+10{{x}^{3}}+........\infty \] will be

The sum of the series \[1+3x+6{{x}^{2}}+10{{x}^{3}}+........\infty \]�

1.	The sum of the series \[1+3x+6{{x}^{2}}+10{{x}^{3}}+........\infty \] will be
A.	\[\frac{1}{{{(1-x)}^{2}}}\]
B.	\[\frac{1}{1-x}\]
C.	\[\frac{1}{{{(1+x)}^{2}}}\]
D.	\[\frac{1}{{{(1-x)}^{3}}}\]
Answer» E.

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The sum of the series \[1+3x+6{{x}^{2}}+10{{x}^{3}}+........\infty \] will be

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