Signals and Systems - ECE Questions and Answers

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For the discrete time system of the given figure

y_k - 0.5 y_k_{- 1} - 0.25 y_k_{- 2} = u_k

y_k + 0.5 y_k_{- 1} - 0.25 y_k_{- 2} = u_k

y_k - 0.5 y_k_{- 1} + 0.25 y_k_{- 2} = u_k

y_k + 0.5 y_k_{- 1} + 0.25 y_k_{- 2} = u_k

Answer : Option C

Explanation :

u_k + 0.5 y_{k - 1} - 0.25 y_{k - 2} = y_k.

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