Wednesday, 27 April 2016

How do these two summations equate?



Apparently, the summation

nj=i+11ji+1
is equal to the summation
nik=11k+1
I don't grasp the intuition behind why.


Answer



Set k=ji so when j=i+1 then ji=1 so k=1. Now when j=n we have k=ji=ni.



No comments:

Post a Comment

real analysis - How to find limhrightarrow0fracsin(ha)h

How to find lim without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...