Two identical spring of constant \( k \) are connected in series and parallel as shown in figure...

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Two identical spring of constant \( k \) are connected in series and parallel as shown in figure. a mass \( m \) is suspended from them. The ratio of their frequencies of vertical oscillations will be
(a)
(b)
(a) \( 2: 1 \)
(b) \( 1: 1 \)
(c) \( 1: 2 \)
(d) \( 4: 1 \)
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