Question: Trying to find a proof of the following equation.
For any $m,n\in \mathbb{N}^0$,$$\sum_{k=0}^{m} \binom{n+k}{k} = \binom{n+m+1}{m}.$$
I know that Vandermonde's identity might be useful but not sure where to start.
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}...
No comments:
Post a Comment