Someone give me a crash course on Unit Step Laplace Transform and Inverse Laplace Transform. Need help on the formula: U(t-a)f(t-a) to (e^-as)F(s) from what i can deduce, the way to use it is (Laplace) - Find a from U(t-a) - group (t-a) together - replace (t-a) with ____ (?) What is a suitable symbol? - work out Laplace - multiply Laplace with e^-as (Inverse Laplace) - Factor out e^-as - find out what is a from e^-as - inverse Laplace - replace t with (t-a) - multiply with U(t-a) Just need to know how to use it, not how it works in detail. Tell me if I got it right and any where to improve on. Also need to know a suitable symbol to replace (t-a) as above. Thanks!