Thank you, it seems i forgot to set it... :(
On Wed, Dec 9, 2009 at 9:59 AM, reyssat <eric.reyssat at math.unicaen.fr> wrote:
> ahmet alper parker a ?crit :
>>
>> I used to solve such equations in maxima before, but this time it does
>> not yield any answer.
>> find_root(sum(1/(C+0.055*i), i, 1, n)-9.09264803473413=0, C, 3.4, 3.5);
>> the solution should be approximately 3.44 (i have done it with
>> goalseek function with a spreadsheet program).
>>
>
> The answer depends on the value of n. If you first set
> n:41;
> then you get :
> (%i3) find_root(sum(1/(C+0.055*i), i, 1, n)-9.09264803473413=0, C, 3.4,
> 3.5);
> (%o3) ? ? ? ? ? ? ? ? ? ? ? ? ?3.447666118589491
>
> For other values of n, you may get an error message "function has same sign
> at endpoints"
>
> Eric
>