When a mass of 2 kilograms is attached to a spring whose constant is 32 N/m, it comes to rest in the equilibrium position. Starting at t = 0, a force equal to f(t) = 102e2" cos(4t) is applied to the system. Find the equation of motion in the absence of damping. -o여(41) + 을해in(41) + e" x(t) = x m

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