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    Periodic Discrete Signal

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    4. Determine if x(n) = cos(pi* n/4)cos(pi* n/4) is periodic. If periodic, calculate period.

    5. Determine if x(n) = cos(3t + pi/4) is periodic. If periodic, calculate period.

    6. For the RC circuit shown in the figure, find the input/output differential equation.

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    Solution Summary

    The solution demonstrates how to find the period of discrete signals. It also shows how to find the input/output differential equation of the circuit. The solution is detailed and well presented. See attachments for further details including graphs and diagrams.