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  1. If the z-transform of x(n) is given by then the filter it represents is __________ .

    2. A.
    low pass
    B.
    high pass
    C.
    band pass
    D.
    all pass

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    Answer : Option D

    Explanation :

    i.e. we can see that

    According to the property, the filter is an all-pass filter.

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