Question: The mathematical model of a nonlinear system is provided. Using the procedure outlined in this section, find the operating point and derive the linearized model.

The mathematical model of a nonlinear system is provided. Using the procedure outlined in this section, find the operating point and derive the linearized model.

\(\ddot{x}+\frac{1}{3} x^{3}=\frac{1}{3}+\sin t, \quad x(0)=1, \dot{x}(0)=1\)

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