Question: What is the impulse response of the system described by the second order difference equation y(n)-3y(n-1)-4y(n-2)=x(n)+2x(n-1)?
Options
A : [-frac{1}{5} (-1)n–frac{6}{5} (4)n]u(n)
B : [frac{1}{5} (-1)n–frac{6}{5} (4)n]u(n)
C : [frac{1}{5} (-1)n+frac{6}{5} (4)n]u(n)
D : [-frac{1}{5} (-1)n+frac{6}{5} (4)n]u(n)
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