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নিচের কোন সম্পকটি সঠিক?

ω = \frac{2 π}{p}

ω = \frac{\sqrt{m}}{k}

\frac{T_{1}}{T_{2}} = \sqrt{\frac{L_{1}}{L_{2}}}

f = \frac{2}{T}

ANS : 3

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