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  1. The continuous time system with impulse response h(t) u(t) is stable, if __________ (n is even).

    2. A.
    a = 0
    B.
    a > 0
    C.
    a < 0
    D.
    none of these

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    Answer : Option C

    Explanation :

    h(t) =

    consider

    ax = x

    ax = x2

    a = x

    For h(t) to be bounded, exponential term should have a negative power.

    i.e. e-t will have response as shown.

    Hence should be < 0

    ∴ a < 0.

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