Recent content by theCalc

I'm a bit lost and confused as to how I would manipulate the series, could you explain what steps would I need to take? Thanks.

The power series $$\sum_{n = 2}^\infty \frac{(n-1)(-1)^n}{n!}$$ converges to what number? So far, I've tried using the Ratio Test and the limit as n approaches infinity equals $0$. Also since $L<1$, the power series converges by the Ratio Test.