1.

If \[x\ne 0\], then the sum of the series\[1+\frac{x}{2!}+\frac{2{{x}^{2}}}{3!}+\frac{3{{x}^{3}}}{4!}+.......\infty \] is

A. \[\frac{{{e}^{x}}+1}{x}\]
B. \[\frac{{{e}^{x}}\,(x-1)}{x}\]
C. \[\frac{{{e}^{x}}\,(x-1)+1}{x}\]
D. \[\frac{{{e}^{x}}\,(x-1)+1+x}{x}\]
Answer» E.


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