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Topic:
How to solve this equation?
Replies:
6
Last Post:
Apr 18, 2012 4:56 PM



networm
Posts:
327
Registered:
10/6/05


Re: How to solve this equation?
Posted:
Apr 18, 2012 2:00 PM


On Apr 18, 12:37 pm, James Waldby <n...@valid.invalid> wrote: > On Wed, 18 Apr 2012 10:09:02 0700, Michael wrote: > > I have sum(w_i, i from 1 to n)=1 given, > > > and also I am given a set of numbers e_i, i from 1 to n. > > > Now I need to find a number u, such that > > > sum(w_i/(u  e_i)^2, i from 1 to n) ... > > > My questions are: are there systematic way of finding all possible > > solutions u? > > You didn't state any condition on u (except perhaps implying it's not > equal to any e_i). State an equation before asking for solutions. Also > clarify if w_i are given (besides e_i) and if u is the only unknown. > > > And is the number of solution related to n? > > > I am thinking of maybe for n=2, the number of solutions u is 1? > > > And for general n, the number of solutions u is n1? > >  > jiw
yes,u is unconstrained... the only unknown...



