The Laplace transform of a function f(t) u(t), where f (t)

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The Laplace transform of a function f(t) u(t), where f (t) is periodic with period T, is A(s) times the L.T. of its first period. Then—

1. A(s) = s
2. A (s) = 1
  1 - e^–Ts
3. A (s) = 1
  1 + e^–Ts
4. A (s) = e^Ts

Correct Option: B

Laplace transform of a periodic wave is given by the relation

A (s) =	1
	1 – e^–Ts

where, T = time period of the given wave