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The bounds of an integral

  1. Apr 9, 2013 #1
    When taking a definite integral that is bound by two points a and x where a is a constant and x is a variable, which quantity do I consider the upper limit of the integral and which quantity is the lower limit?
    [tex]\int^a_x x [/tex]
    this integral is written as
    [tex] -\int^x_a x [/tex] in my book.
    When I use integrals in my dynamics class I can easily tell which limit goes where but this is much tougher in math class because all I am given are random functions to integrate.
     
  2. jcsd
  3. Apr 9, 2013 #2

    HallsofIvy

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    You have to be told to integrate "from a to b".
     
  4. Apr 9, 2013 #3
    ok. I always assumed it didn't really matter, I can't believe I got so many questions right doing what I did.
     
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