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

 Messages: [ Previous | Next ]
 James Waldby Posts: 545 Registered: 1/27/11
Re: How to solve this equation?
Posted: Apr 18, 2012 1:37 PM

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 n-1?

--
jiw

Date Subject Author
4/18/12 Michael
4/18/12 James Waldby
4/18/12 networm
4/18/12 networm
4/18/12 networm
4/18/12 quasi
4/18/12 Dan Cass