The output y[n] of a discrete-time system for an input x[n] is\(y\left – McqOptions

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1.	The output y[n] of a discrete-time system for an input x[n] is\(y\left[ n \right] = \mathop {\max }\limits_{ - \infty \le k \le n} \left\| {x\left[ k \right]} \right\|\)The unit impulse response of the system is
A.	0 for all n
B.	1 for all n
C.	unit step signal u[n]
D.	unit impulse signal δ[n]
Answer» D. unit impulse signal δ[n]

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