Laplace transforms

Discussion in 'Math' started by full, Dec 1, 2014.

  1. full

    Thread Starter Member

    May 3, 2014
    225
    2
    hello
    Determine the Laplace transforms of these functions:
    I see the table for laplace but I do not find same this in table !
    what I will do?

    Capture.PNG
     
  2. full

    Thread Starter Member

    May 3, 2014
    225
    2
  3. WBahn

    Moderator

    Mar 31, 2012
    17,716
    4,788
    You use what are generally called "operational transforms" to manipulate this into a form for which you have a "functional transform" in the table.

    For instance, could you work any of the following:

    f(t) = t·u(t)

    f(t) = (t - 2 sec)·u(t - 2 sec)

    f(t) = (t - 2 sec)·u(t)

    f(t) = t·u(t - 2 sec)
     
  4. amilton542

    Active Member

    Nov 13, 2010
    494
    64
    @WBahn

    I don't think he's familiar with the (t-a) shift nor the unit-step (Heaviside) function. That's what the confusion is, I think.
     
  5. WBahn

    Moderator

    Mar 31, 2012
    17,716
    4,788
    Which is why I asked which, if any, of those forms he could work. Trying to narrow down where the boundary is of what he does and doesn't know so that we have someplace to start.
     
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