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For each of the following systems, y[n] denotes the output and x[n] the input. Test each system for linearity and shift-invariance and show the result.

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For each of the following systems, y[n] denotes the output and x[n] the input. Test each system for linearity and shift-invariance and show the result. (a) y[n]=2x[n]+3 (b) y[n]=x[n]sin(72n+6) (c) y[n]=[x[n]]2+3x[n]1

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