Time Invariance
The system is not time invariant. This is plainly seen from the coefficient of the $ \delta $ functional in the $ Y_k[n] $ column. As the input changes, the output changes as the square of the subscript in the input sequence.
The system is not time invariant. This is plainly seen from the coefficient of the $ \delta $ functional in the $ Y_k[n] $ column. As the input changes, the output changes as the square of the subscript in the input sequence.