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Mathematics 14 Online
OpenStudy (anonymous):

Solve the initial value problem (dx/dt)-4x=cos (3t) with x(0)=0

OpenStudy (jamesj):

I spent quite a bit of time with you last night on this problem. I still recommend you watch this lecture: http://ocw.mit.edu/courses/mathematics/18-03-differential-equations-spring-2010/video-lectures/lecture-3-solving-first-order-linear-odes/ If you understand it, you will have absolutely not problem solving your IVP.

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