engineering recuitment GATE EE 2023-24 Test Series Signals and Systems Linear Time Invariant Systems
Which of the following systems are linear time-invariant and causal systems.
1
\(\frac{{dy}}{{dt}} + 6y\left( t \right) = 4x\left( t \right)\)
2
y[n] + 2y [n – 1] = x [n + 1]
3
y[n+1] + 4 y[n] = 3x [n+1] - x[n]
4
\(\frac{{dy}}{{dt}} + {y^2}\left( t \right) = x\left( t \right)\)