1. ## [SOLVED] Null Sequence

Hi

Very small question. Is $\displaystyle 1/n!$ a basic null sequence?

I know that $\displaystyle n^p/n!$ is when $\displaystyle p>0$ but not sure about the first one.

Just looking for some clarification

Thanks!!

2. Originally Posted by Ian1779
Hi

Very small question. Is $\displaystyle 1/n!$ a basic null sequence?

I know that $\displaystyle n^p/n!$ is when $\displaystyle p>0$ but not sure about the first one.

Just looking for some clarification

Thanks!!
yes it is. even 1/n will suffice

3. Thanks - I wasn't totally sure!

One final one. Will $\displaystyle 1/(-1)^n$ be a null sequence?

4. Originally Posted by Ian1779
Thanks - I wasn't totally sure!

One final one. Will $\displaystyle 1/(-1)^n$ be a null sequence?
no

you know what a null sequence is, right?

5. Yeah. I asked this last night ( was feeling a bit tired and not with it). I did know it can't be a null sequence because of the $\displaystyle (-1)^n$ part, not sure what made me ask!

Thanks for the other bit though!!