13.5.8. To determine whether a material point is located in the vibrational motion, if the differential equation of motion is x + 2x + 2 = 0.

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(Chapter 3 - Dynamics theme - 13.1: Free damped oscillations) from the collection of short tasks on the theoretical mechanics Kep OE, JA Viba, OP Grapis, JA Svetinysh et al. Publishing Moscow / Graduate School / 1989, 2009, 2012.
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