I'm trying to prove the following by induction:
sum(k*2^(H-k), k = 0 .. H) = N-H-1
it's a problem for an algorithms class. I was thinking I could do what I normally do for summations, which is to assume that it works for some P(m) and then increment the sum for P(m+1) and work backwards by adding to the right side what the additional summation on the left side produces.
But, this problem is different because substituting H+1 changes each term inside of the summation... so I don't think that technique will work.
This is a homework problem... so I'm obviously not expecting a complete solution. But, I'm not really sure where to take the summation so I'm looking for other ways of doing the induction.