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MIT 18.03SC Differential Equations 13 Online
OpenStudy (anonymous):

I am doing these course Laplase Transformation and stuck at these question of recitation : these the link of recitation 2nd question-http://ocw.mit.edu/courses/mathematics/18-03-differential-equations-spring-2010/recitations/MIT18_03S10_rec_18.pdf And these is the solution link - http://ocw.mit.edu/courses/mathematics/18-03-differential-equations-spring-2010/recitations/MIT18_03S10_rec_18_sol.pdf I don't understand why f(t)u(t) notation is used and what are the delta(t) & u(t). where they come from?

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