(Properties of Discrete Systems) Determine (with justification) whether the following systems are (i) memoryless, (ii) causal, (iii) invertible, (iv) stable, and (v) time invariant. For invertibility, either find an inverse system or an example of two inputs that lead to the same output. Note that y[n] denotes the system output and r[n] denotes the system input. a) y[n] = x[n]2[n – 1] x[n + 1] Sz{n-1), n<0, b) y[n] = 1 «[n +1], n>0. c) y[n] = cos(x[n])

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science is the study of the nature and behavior of natural things and the knowledge that we obtain about them. a science is a particular branch of science such as physics, chemistry, or biology. physics is the best example of a science which has developed strong, abstract theories.

pseudoscience is a collection of beliefs or practices mistakenly regarded as being based on scientific method.

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the answer is d

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