Let f(t) be a function of t defined all for all t > 0 then the laplace transforms of f(t) denoted by L{f(t)} is defined by L{f(t)}=∫_0 ∞▒e (-st) f(t)dt This integral exists (i.e ., has some finite value ) It is a function of s, say F(s) or f(s) i.e ., L{f(t)}= L(f) = F(s) = f ̅(s) ∴f(t) = L (-1) (f) =L (-1) { f(s)} Thenf(t) is called inverse Laplace Transform off ̅(s) The symbolL, which transforms f(t) into f(s) is called the Laplace Transformation operator .
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