# Converting 2nd order ODE to 1st order ODE's

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• Oct 8th 2011, 06:21 PM
sampf
Converting 2nd order ODE to 1st order ODE's
• Oct 8th 2011, 07:15 PM
Ackbeet
Re: Converting 2nd order ODE to 1st order ODE's
Typically, you'd let $x_{1}=u$ and $x_{2}=\dot{u}.$ Then rewrite the DE using only those two variables and their derivatives. What do you get?