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Very slow with maths.

  1. Jul 3, 2003 #1
    So can someone explain to me how, (0! + 0! + 0! + 0!)! = 24

    Im sure this is simple to most of you but i am very slow when it comes to maths.
     
  2. jcsd
  3. Jul 3, 2003 #2
  4. Jul 3, 2003 #3

    goo

    User Avatar

    I still don't get it. Can someone explain?

    4! = 4 x 3 x 2 x 1 = 24

    0! = 0 x -1 x -2 x -3 ~ = 1

    huh? :)
     
  5. Jul 3, 2003 #4
    no 0! = 1 (by definition)
    you can think of it like this:
    n! = (n-1)!*n
    so:
    3! = 2!*3
    2! = 1!*2
    1! = 0!*1 => 0! = 1

    also there is no factorial for negative or not-integer numbers (at least I think...)
     
  6. Jul 3, 2003 #5
    well it seems there is possible to define factorial for complex numbers:
    factorial from mathworld
     
  7. Jul 3, 2003 #6

    goo

    User Avatar

    thanks guybrush, that cleared things up.
     
  8. Jul 3, 2003 #7
    Thank you.
     
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