Correct Answer: e-st F(s)
Explanation:
All linear system possess the property of superposition i.e., if input u1 gives output y1 and input u2 gives output y2 then input u1 + u2 will give output y1 + y2.
Superposition implies homogencity i.e., if input u gives output y, then input ku gives output ky where k is a rational number.
In general a system is linear if a transformation T satisfies the relation
T(au1 + βu2) = aT(u1) + βT(u2)
where a and β are constant.
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