• Skip to primary navigation
  • Skip to main content
singaporeolevelmaths

singaporeolevelmaths

Simple Tips for Better Maths Results!

Show Search
Hide Search
  • About
  • Books
    • O-Level Maths Ten Years Series Books
    • O-Level Pocket Summary
    • Secondary 3 and 4 Elementary Maths Mentor Series
  • Videos
  • What Students Say
  • Contact

binomial

The Exclamation Mark ! in Binomial Theorem

factorial-sign-binomialBinomial Theorem came out as a 9 marks question in 2009 GCE 'O' Level Additional Mathematics Paper (Subject Code: 4038) so you know as well as I do the importance of Binomial.

Read about other useful posts on Binomial Theorems:

  • Binomial Expansion Teaches how to choose the RIGHT partner (:
  • A-Math Binomial Expansion: Finding Term Independent of x By A Shortcut Method
  • Exam Question : Usage of Binomial Formula

I'm looking at the question now. It is testing on the usage of the Binomial formula, including the 'n choose r' formula. Many students call this sign: '!' 'exclamation mark' which is known correctly as factorial.

I will be using the following question to illustrate how to simplify the 'n choose r' formula without memorizing. (I understand some schools want students to memorize)

Let's begin by understanding what's 'n choose r' all about:

n-choose-r-binomial
Click on image for larger view

Do you know how to simplify 'n choose 3'?

Here's the question which requires us to apply what we have discussed. I would suggest you attempt it on your own before clicking here for the solution.

binomial-question
binomial-question

Filed Under: A-Maths Tuition, Weekly Question Tagged With: binomial, factorial sign, o level 2009

  • « Go to Previous Page
  • Go to page 1
  • Go to page 2
  • Go to page 3
  • Go to page 4
  • Go to page 5
  • Interim pages omitted …
  • Go to page 7
  • Go to Next Page »

Copyright © 2021 · singaporeolevelmaths.com · Talk to us at 88290998