Got it work. Thank you very much. Regards,

Got it work. Thank you very much. Regards,

Looks perfect. Thanks Georgios. Would you mind tell me how to get that curve? From the Solve and evalf? I tried but got only information like: Warning, solutions may have been lost. Sorry I am a newbie and do not have enough knowledge on Maple. Thanks again for your help. Take care, James

Looks perfect. Thanks Georgios. Would you mind tell me how to get that curve? From the Solve and evalf? I tried but got only information like: Warning, solutions may have been lost. Sorry I am a newbie and do not have enough knowledge on Maple. Thanks again for your help. Take care, James