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Notas de Aula - Parte 2

Notas de Aula - Parte 2

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d) Exponencialf ( t)= e−at∞−at−st1L(f ( t))= F(s)= ∫ e e dt =0 ( s + a)Teoremasa) Teorema do <strong>de</strong>slocamento em tf(t)g(t)t-t 0⎧ f ( t − t0), t ≥ tg(t)= ⎨⎩0,t < t0L{f ( t − tb) Teorema do <strong>de</strong>slocamento em s0∞)} = ∫ f ( t − t000) edt = e−st −st0F(s)L{ec) Teorema do Valor Finald) Teorema do Valor Inicialat∞f ( t)}= ∫e0atf ( t)e−st∞dt = ∫ elim f ( t)lim0sF(s)t→ ∞=s→0atf ( t)e−(s −a)tdt = F(s − a)lim 0f ( t)lim sF(s)t→ =s→∞Exemplos:

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