Yes, I should have used assum(a>0), thanx for reminding me!
Also, the var('a,r,n') was a typo, sorry, I was writing this from memory on my iPod Touch on the commute home....
HTH, A. Jorge Garcia http://shadowfaxrant.blogspot.com http://www.youtube.com/calcpage2009 Teacher & Professor Applied Mathematics, Physics & Computer Science Baldwin Senior High School & Nassau Community College -- You received this message because you are subscribed to the Google Groups "sage-edu" group. To post to this group, send email to sage-...@googlegroups.com. To unsubscribe from this group, send email to sage-edu+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-edu?hl=en.