Apparently, the summation
n∑j=i+11j−i+1
is equal to the summation
n−i∑k=11k+1
I don't grasp the intuition behind why.
Answer
Set k=j−i so when j=i+1 then j−i=1 so k=1. Now when j=n we have k=j−i=n−i.
How to find lim without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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