An assembly of three springs connected in series as shown in Fig. P2.20 has an equivalent stiffness k given by
(b) Solve equation (2.67) for k 1 by each of the following method: (i) factoring, (ii) quadratic formula, and (iii) completing the square. For each ca. determine the value of’ k 3 corresponding to the only physical coalition for k 1.
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