In the following pick out the time-invariant systems. (i)dy(t) + 5y(t) = u(t)dt (ii) td2y(t) + dy(t) + 2y(t) = v(t)dt2dt (iii)d2y(t) + 5dy(t) + 6y(t) = (t)dt2dt

In the following pick out the time-invariant systems. (i)dy(t) + 5y(t)

1.	In the following pick out the time-invariant systems. (i)dy(t) + 5y(t) = u(t)dt (ii) td2y(t) + dy(t) + 2y(t) = v(t)dt2dt (iii)d2y(t) + 5dy(t) + 6y(t) = (t)dt2dt
A.	(i) and (iii)
B.	(i) and (ii)
C.	(ii) and (iii)
D.	(i) only
Answer» B. (i) and (ii)

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In the following pick out the time-invariant systems. (i)dy(t) + 5y(t) = u(t)dt (ii) td2y(t) + dy(t) + 2y(t) = v(t)dt2dt (iii)d2y(t) + 5dy(t) + 6y(t) = (t)dt2dt

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