Signals and Systems

For the system in the given figure

A y_k = u_k + 0.5y_{k - 2}

B y_k = u_k + 0.5u_{k - 2}

C y_k = u_k - 0.5y_{k - 2}

D y_k = u_k - 0.5u_{k - 2}

ANS:A - y_k = u_k + 0.5y_{k - 2}

y_k has two unit delays and then a multiplier of 0.5 before being fedback.

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