When I saw the large solution Obtained by Maple , I think I am stupid, I use Maple like the human, too heavily depend on it. Maybe do simplify works by myself, then pass the rest to Maple, the things will go easily.

It is too late now, Try it tomorrow;

Thank Jean and Georgios;

Regards

Jack

How does I define some varibles as constants,

if  it could be done, i would define the following as constants;

da  db  fa0  fa1  fb0  fb1

Best Regards

Jack

Had I made something wrong ?

Or is there some others funtion which can solve the equations

Regards

Jack

Thank you a lot for helping me.

I do not know why Maple is still runing to solve the equations, it already take more than several hours.

If you have time , pls send the returned result to me,

my mail address is   yuan_hj2005@hotmail.com

Best Regards,

Jack

Thank you very much!

I  corrected the mistake according what you have saided,  but Maple takes a long time to calculate it. It is still runing now.

Is there other way to make it faster , or I have made others wrong in above.

Regards,

Jack