in Calculus recategorized by
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The infinite series $1+x+\dfrac{x^2}{2!}+\dfrac{x^3}{3!}+\dfrac{x^4}{4!} + \dots $ corresponds to

  1. $\sec x$
  2. $e^x$
  3. $\cos x$
  4. $1+\sin^2x$
in Calculus recategorized by
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