1.

\[\frac{{{1}^{2}}.2}{1\,!}+\frac{{{2}^{2}}.3}{2\,!}+\frac{{{3}^{2}}.4}{3\,!}+.....\infty =\] [UPSEAT 1999]

A. \[6\,e\]
B. \[7\,e\]
C. \[8\,e\]
D. \[9\,e\]
Answer» C. \[8\,e\]


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