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6.
Two springs having stiffness k₁ and k₂, respectively are used in a vertical position to
support a single object of mass m. Show that the angular frequency of oscillation is
[(k₁+k₂)/m] ¹/2 if the springs are tied in parallel, and [k₁k₂/(k₁+k₂)m]¹/² if the
springs are tied in series.

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