Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What's this in math?

  1. Oct 22, 2012 #1
    2cct0d5.png

    in the above pic, (n 0) = 1?? what topic in math is that? i never saw this in my high school math and only saw it in my uni class. i don't know how that is. can someone please help me?
     
  2. jcsd
  3. Oct 22, 2012 #2

    micromass

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2016 Award

    They are binomial coefficients. We define

    [tex]\binom{n}{k}=\frac{n!}{k! (n-k)!}[/tex]

    You have no doubt seen this before in combinatorics, but with other notation. It is a mystery to me why high school textbooks don't use the [itex]\binom{n}{k}[/itex] notation.

    http://en.wikipedia.org/wiki/Binomial_coefficient
     
  4. Oct 22, 2012 #3
    super! and of course i know about binomial coefficients. just like this cf53c9e57be2cdfe572da491e078d9ff.png

    thank you very much. now i'm not scared anymore!! :D
     
  5. Oct 22, 2012 #4

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    It comes from the convention 0!=1.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: What's this in math?
  1. What is this math? (Replies: 12)

  2. What math is this? (Replies: 1)

Loading...