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. Write and solve a differential equation that models the motion of a spring whose mass...

. Write and solve a differential equation that models the motion of a spring whose mass is 2a, spring constant b, and damping a, where the numbers a is 3, b is 6. Assume that the initial position is y = 1 and initial velocity is y 0 = −1. Write your solution as a single, phase-shifted cosine function.

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