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A filter has zeroes at +/- r, on the real axis of the z-plane, and poles...

A filter has zeroes at +/- r, on the real axis of the z-plane, and poles at a radius of r, but with a frequency of +/-6 kHz. The sampling frequency is 44.1 kHz. Here r =0.80. Write the recursive function for y[n]. Include all the steps. ?

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