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Math Help - [SOLVED] Partial Differentiation

  1. December 2nd 2009, 12:15 PM #1
    schnek
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    [SOLVED] Partial Differentiation

    If g(s,t)=f( s2-t2 , t2-s2 ) show that t(dg/ds)+s(dg/dt)=0
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  2. December 2nd 2009, 12:54 PM #2
    Haven
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    Before I can help, i just have to clarify some notation.

    Do we define g(s,t) = f(2s - 2t, 2t-2s) or g(s,t) = f(s_{2} - t_{2}, t_{2}-s_{2})?
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  3. December 2nd 2009, 01:02 PM #3
    schnek
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    oh! Sorry :S It is actually g(s,t) = f(s^{2} - t^{2}, t^{2}-s^{2})
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