Sunday, 30 March 2014

real analysis - Find the sum $sum_{j=0}^{n}j$

Find the sum $\sum_{j=0}^{n}j$




for all $n=0,1,2,3,\dots$.



How do I find/evaluate this sum?

-

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)

real analysis - How to find $lim_{hrightarrow 0}frac{sin(ha)}{h}$

How to find $\lim_{h\rightarrow 0}\frac{\sin(ha)}{h}$ without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...