

MCQOPTIONS
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1. |
The sum of the series \[\frac{1}{2\,!}-\frac{1}{3\,!}+\frac{1}{4\,!}-.....\] is [DCE 2002] |
A. | e |
B. | \[{{e}^{-\,\frac{1}{2}}}\] |
C. | \[{{e}^{-\,2}}\] |
D. | None of these |
Answer» E. | |