Question: Trying to find a proof of the following equation.
For any m,n∈N0,
m∑k=0(n+kk)=(n+m+1m).
I know that Vandermonde's identity might be useful but not sure where to start.
How to find lim without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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