wow with 377 views that was a great help
they did one in class but I got lost on getting A and B
really appreciate the steps
A quick note:
$ \displaystyle \sum_{k = 1}^{\infty} \dfrac{k^2}{2^k} \neq \sum_{k = 1}^{\infty} k^2 \cdot \sum_{k = 1}^{\infty} \dfrac{1}{2 ^k} $
(a) Show that if the ring has characteristic zero then the elements $n\cdot 1\ (n\in\Bbb{N})$ are all different.
(b) If the characteristic
Hi, I'm trying to solve the sum of following infinite series:
$ \displaystyle \sum_{k=1}^{\infty} \frac{{k}^{2}+4}{{2}^{k}} = \sum_{k=1}^{\infty}$
Re: 281 7.5.9 int wiht partail fractions
Yeah but I still sometimes miss those old days where DOS was high tech and Windows hadn't been invented yet.
topsquark Today, 21:16-Dan