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  1. In the following, pick out the linear systems.
    (i)
    d2y(t)
    + a1
    dy(t)
    + a2y(t) = u(t)
    dt2dt

    (ii) y
    dy(t)
    + a1y(t)= a2u(t)
    dt

    (iii) 2
    d2y
    + t
    dy
    + t2y(t) =5
    dt2dt

    1. (i) and (ii)
    2. (i) only
    3. (i) and (iii)
    4. (ii) and (iii)
Correct Option: C

For more detail refer the synopsis of signals and systems.



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