which of the following system is a causal system?(a) y(t)=sin[u(t+3)](b) y(t)=5u(t)+3u(t-1)(c) y(t)=5u(t)+3u(t+1)(d) y(t)=sin[u(t-3)]+sin[u(t+3)]

y(t)  = x(t) + x(t-3) + 1/x(t+4) is the given system causal ?

We define y[n] = nx[n] – (n-1)x[n]. Now, z[n] = z[n-1] + y[n]. Is z[n] a causal system?Select one:1. Yes2. No

Given that S1 and S2 are two discrete time systems. Consider the following statements: i) If S1 and S2 are linear, then S is linear ii) If S1 and S2 are non-linear, then S is non-linear. iii) If S1 and S2 are causal, then S is causal. iv) If S1 and S2 are time invariant, then S is time invariant. The true statements from the above are ____________Select one:1. i, ii, iii2. I, ii, iii, iv3. ii, iii, iv4. I, iii, iv

A discrete-time system is defined as y(n)= x(n^3). The system is 1 pointCausal, non-linear and time-invariantnon-causal, linear and time-invariantCausal, linear and time-invariantCausal, linear, and time-variantnon-causal, non-linear and time-variantnon-causal, linear and time-variant

n LTI system has the impulse response given by h[n]= u[n+2] + 2 u[n-3] - 3 u[n-7] is 1 pointstable and causalunstable and not causalStable but not causalcausal but not stable