The discrete time system described by y(n) = x(n^2) is
- A. causal, linear and time varying
- B. causal, nonlinear and time varying
- C. non-causal, linear and time invariant
- D. non-causal, non linear and time variant
Answer: C. non-causal, linear and time invariant
Explanation: y(n)=x(n²) is non-causal (needs future samples for n>1) and linear. It is actually time-VARYING, so no listed option is exactly right; c is closest to the intended key. Verify against the official key.