Results 1 to 2 of 2

Math Help - Factorials

  1. #1
    Newbie
    Joined
    May 2012
    From
    Atlanta
    Posts
    12

    Factorials

    Hello everyone. Is the an easier way to I evaluate a factorial like the following without writing every number out and canceling.

    20!9!
    7!21!

    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    14,977
    Thanks
    1121

    Re: Factorials

    Quote Originally Posted by troe View Post
    Hello everyone. Is the an easier way to I evaluate a factorial like the following without writing every number out and canceling.

    20!9!
    7!21!

    Thanks
    \frac{20!}{21!}\frac{9!}{7!}= \frac{20!}{21(20!)}\frac{9(8)7!}{7!}
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. factorials
    Posted in the Algebra Forum
    Replies: 3
    Last Post: November 16th 2011, 02:42 AM
  2. Factorials 2
    Posted in the Discrete Math Forum
    Replies: 3
    Last Post: November 18th 2009, 12:24 PM
  3. Factorials
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: May 24th 2009, 09:13 PM
  4. factorials
    Posted in the Algebra Forum
    Replies: 1
    Last Post: March 27th 2009, 05:53 PM
  5. Getting rid of factorials
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 14th 2009, 10:04 AM

Search Tags


/mathhelpforum @mathhelpforum