Classify the critical point (0, 0) of the plane autonomous system corresponding to the nonlinear second-order differential equation x" + µ(x² − 1)x¹ + x = 0 where u is a real constant. (Assume y = x'.)

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Q: ing La 15. y' + 3y = t, = { 0, 0≤t≤2, t> 2 y (0) = 0

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