Consider the series ∑n=0∞xnn!\sum_{n=0}^{\infty} \frac{x^n}{n!}∑n=0∞n!xn. What is the function f(x)f(x)f(x) this series represents?
sin(x)\sin(x)sin(x)
cos(x)\cos(x)cos(x)
exe^xex
ln(x)\ln(x)ln(x)