Two spring of force constants \( k_{1} \) and \( k_{2} \) are conne...

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Two spring of force constants \( k_{1} \) and \( k_{2} \) are connected to a mass \( m \) as shown in figure. The frequency of oscillation of the mass is \( f \). If both \( k_{1} \) and \( k_{2} \) are made four times their original values, the frequency of oscillation becomes
(a) \( f / 2 \)
(b) \( f / 4 \)
(c) \( 4 f \)
(d) \( 2 f \)
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