Exam Questions Papers - Engineering

Q1:

Consider the z-transform X(z) = 5z2 + 4z-1 + 3; 0 < |z| < ∞ The inverse transform x[n] is

A 5δ[n + 2] + 3δ[n] + 4δ[n - 1]

B 5δ[n - 2] + 3δ[n] + 4δ[n + 1]

C 5u[n + 2] + 3u[n] + 4u[n - 1]

D 5u[n - 2] + 3u[n] + 4u[n + 1

ANS:A - 5δ[n + 2] + 3δ[n] + 4δ[n - 1]

X(z) = 5z2 + 4z-1 + 3 = .