Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: ODE problem: 3x^2 y dx + (x^3 + 2y)dy = 0

  1. Feb 26, 2006 #1
    I have two ODE with which I cannot to slove;

    3x2ydx+(x3+2y)dy=0

    I tried to change of variable y=v*x, but I still cannot find a way to solve it.

    the second is:

    (exsin(y)-2ysin(x))dx+(excos(y)+2cos(x))dx=0

    here I have no idea


    thank you
    B
     
  2. jcsd
  3. Feb 26, 2006 #2

    quasar987

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    They are exact diff equ. Have you not seen how to solve such ode's?
     
  4. Feb 26, 2006 #3

    Hurkyl

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Surely you know other techniques for solving ODE? This problem is tailor-made for one of them.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook