MathGroup Archive 2000

[Date Index] [Thread Index] [Author Index]

Search the Archive

Chain rule


Hello,

I am just trying to solve:
dy/dx when x = 2t + 5 and y = 2t^2 - 1.

Can it be done directly by Mathematica or do I have to solve dy/dt and
dx/dt and finally divide dy/dt by dx/dt?

I tried posing x = 2t + 5 and y = 2t^2 - 1 and ask solve for D [y,x], but
that does not evaluate properly (the answer is 2t).  I would have thought
that Mathematica would have used the chain rule automatically.

Thanks for your help,




  • Prev by Date: cam Mathematica use dual processors?
  • Next by Date: Mathematica 3.0 errors
  • Previous by thread: cam Mathematica use dual processors?
  • Next by thread: Re: Chain rule