Student Support Forum: 'Running time: slow, is it normal? Derivative.' topicStudent Support Forum > General > Archives > "Running time: slow, is it normal? Derivative."

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 Author Comment/Response Alonso 05/28/11 3:15pm [Forum Moderator: similar to http://forums.wolfram.com/student-support/topics/25755. This expression, D[((x*l1...), x], turns out to be much more complicated that the earlier one.] I am a beginner, and would like to know if it is possible to solve for x the first derivative of a long equation in Mathematica. Bear with me, my background is in Biomedical Sciences. I am typing the following command: Solve[D[((x*l1 + (1 - x)*l2)/((x^2*v1 + (1 - x)^2*v2 + 2*x*(1 - x)*c)^0.5))+((x*L1 + (1 - x)*L2)/((x^2*V1 + (1 - x)^2*V2 + 2*x*(1 - x)*C)^0.5)), x]==0,x] But Mathematica 8 simply stops, and no output is given. Any tips? Cheers! Alonso URL: ,

 Subject (listing for 'Running time: slow, is it normal? Derivative.') Author Date Posted Running time: slow, is it normal? Derivative. Alonso 05/28/11 3:15pm Re: Running time: slow, is it normal? Derivative. Sjoerd C . d... 05/30/11 2:35pm
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