13.5.25. The differential equation of the oscillatory motion of a particle is given by x + 4 + 20x = 0. Find the logarithmic decrement, considering the maximum deflection after half-cycle fluctuations.

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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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