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electronics and communication engineering signals and systems
1. A casual LTI system is described by the difference equation 2y[n] = a y[n - 2] - 2x[n] + βx[n -1] The system is stable only if
(A): |β| < 2, any value of a
(B): |a | > 2 |β| > 2
(C): |a | < 2 any value of β
(D): |a | = 2 |β| < 2
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