Max solution using solve

Posted on 2008-11-19 15:46 By alexiocowabunga (

17)

Categories:

How do I ...? with Maple

Hi all,

when using solve to solve a simultaneous equation e.g. " solve({6*c+d=24,6*c^2+d^2=96}; " I will obtain two solutions, or with different values maybe even more, I want to put the solutions into an equation e.g." c^6*d" and obtain the maximum value from all the sets of solutions I have.

Any help I will be very grateful, at the moment I am working out by copying and pasting but it will get much harder as the number of solutions increases.

Thanks,

Alex

eval

Comment on 2008-11-19 16:11 from acer ( Maple Rating 4

1410)

> seq([eval(c^6*d,x),x], x in solve({6*c+d=24,6*c^2+d^2=96},[c,d]));
             3072000000
            [----------, [c = 20/7, d = 48/7]], [0, [c = 4, d = 0]]
               823543

> map2(op,1,[%]);
                                 3072000000
                                [----------, 0]
                                   823543

> max(%);
                                  3072000000
                                  ----------
                                    823543

Or, simply,

> max(seq(eval(c^6*d,x), x in solve({6*c+d=24,6*c^2+d^2=96},[c,d])));
                                  3072000000
                                  ----------
                                    823543

acer

Thank you

Comment on 2008-11-19 18:56 from alexiocowabunga (

17)

Thank you that is great, can now get down to some work.