1. Find the output y[n] of the DE y[n] = 2x[n] + 3x[n-1] - x[n - 2] in the simplest form for each of the following cases, assuming zero initial conditions: i. x[n] = 2, n ≥ 0 ii. x[n] = 5n, n≥ 0 iii. x[n] = =4 (9)". n≥0 iv. x[n] = 10 cos(nл/2), n≥ 0

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