1.

If \[y=1-x+\frac{{{x}^{2}}}{2!}-\frac{{{x}^{3}}}{3!}+\frac{{{x}^{4}}}{4!}-\]....., then \[\frac{{{d}^{2}}y}{d{{x}^{2}}}=\] [Karnataka CET 2003]

A.            \[x\]
B.            \[-x\]
C.            \[-y\]
D.            \[y\]
Answer» E.


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