Let a >0 and B >0 be positive constants. The Laplace transform of the function f(t) = eat cos(Bt) is defined by L[f] = f° e=steat cos(ßt)dt. What is the domain of this Laplace trans- form L[f]? Note: You do not have to evaluate the integral to answer this question. Select one: |(0, 00). (a, 00). O a. (a, a + B). (3, о0). Od.

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