Here's the question you clicked on:
liliy
LINEAR ALGEBRA ::Show that if A is nxn and has all 0’s on and below the diagonal then An = 0. Hint: do not at first be too ambitious. First find A2 and observe something useful about it. What about A3
Hey there @liliy - probably have better luck asking this in math, eh? ;)
Nope, this is the OpenStudy Feedback group (should be on the bar at the top) ;)
ooohhhh... wwooopppsss.... didnt even know what this group is...
Hehe, no worries! Just didn't want you to think that everyone was ignoring your question is all :)
ya, i was starting to get a bit sad. just reposted it. thanks