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Problem with an integral

  1. Jul 27, 2008 #1
    Yesterday in class a professor give us this problem:

    X= integral of 3du

    This is my first year in the university, and I don't know anything about integrals, I have tried to solve it, but I can not find the result... the correct result. It was like a "brain shock" for me, because the professor doesn't explain nothing, just give us that.
    Also, I don't know english, and I don't know if somebody could help me.

    Thank you anyway...
  2. jcsd
  3. Jul 27, 2008 #2
    The problem is [tex]x= \int{3du}[/tex]. So, how would you integrate a constant?

    This might help if I change the variables to x, y which you're probably more accustomed to seeing. [tex]y= \int{3dx}[/tex]
  4. Jul 27, 2008 #3
    An integral is like asking you for an anti-derivative. So that question is basically asking you the antiderivative of 3 with respect to x, which is _____________?
  5. Jul 27, 2008 #4


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    Welcome to PF!

    Hi Manzanita! Welcome to PF! :smile:

    In case you don't understand "anti-derivative", that means that you are looking for a function y(x) such that dy/dx = 3. :smile:
  6. Jul 27, 2008 #5

    Thank you :D

    I was really [I don't know how to explain it...] "problemous... problematic?" [sorry my english is not very well indeed...]

    I have seen the answers and I have understand [reading my book and this topic].

    Thank you very much ^^

    PD: Muchas gracias de veras :D!!!!
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