these are the last two questions that i'll have for the rest of the semester (i hope)

find the taylor series for $f(x)=x^4-3x^2+1$ centered at the given value of $a=1$. assume that $f$ has a power series expansion. also find the associated radius of convergence.

find the sum of the series $\sum_{n=0}^{\infty} \frac{2^n}{3^nn!}$