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[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.