In the following, pick out the linear systems(i) d2y(t)/dt2 + 9a1dy(t) – McqOptions

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1.	In the following, pick out the linear systems(i) d2y(t)/dt2 + 9a1dy(t)/dt + a2y(t) = u(t)(ii) y(t)dy(t)/dt + a1y(t) = a2 u(t)(iii) 2d2y(t)/dt2 + dy(t)/dt + t2y(t) = 5
A.	(i) and (ii)
B.	(i) only
C.	(i) and (iii)
D.	(ii) and (iii)
Answer» D. (ii) and (iii)

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