Signals and Systems - ECE Questions and Answers

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Which one of the systems described by the following I/P - O/P relations is time invariant

y(n) = n x(n)

y(n) = x(n) - x(n - 1)

y(n) = x(- n)

y(n) = x(n) cos 2pf₀n

Answer : Option B

Explanation :

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