MCQ
$\int_{}^{} {\left( {1 + x + \frac{{{x^2}}}{{2\;!}} + \frac{{{x^3}}}{{3\;!}} + ..........} \right)\;dx = } $
  • A
    $ - {e^x} + c$
  • ${e^x} + c$
  • C
    ${e^{ - x}} + c$
  • D
    $ - {e^{ - x}} + c$

Answer

Correct option: B.
${e^x} + c$
b
(b)$\int_{}^{} {\left( {1 + x + \frac{{{x^2}}}{{2\,!}} + \frac{{{x^3}}}{{3\,!}} + .......} \right){\rm{ }}dx = \int_{}^{} {{e^x}dx = {e^x} + c.} } $

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