In under damped vibrating system, if x1 and x2 are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to
1
\(\frac{{x1}}{{x2}}\)
2
\(\log \left( {\frac{{x1}}{{x2}}} \right)\)
3
\({\log _e}\left( {\frac{{x2}}{{x1}}} \right)\)
4
log (x1.x2)
5
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