L3. Solve the following second order linear differential equation dax + 9x = f(t), dt2 subject to the following initial conditions x(0) = 0, = dx (O) = 0, dt =
(b) and when the right hand-side is (12 marks] f(t) = 6 cos(3t). =
L3. Solve the following second order linear differential equation dax + 9x = f(t), dt2 subject to the following initial
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L3. Solve the following second order linear differential equation dax + 9x = f(t), dt2 subject to the following initial
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