## The ! function

Fractions, ratios, percentages, exponents, number patterns, word problems without variables, etc.

### The ! function

I have encountered a problem that says to solve "9!". What is the exclamation point mean and how do you properly use this function in word problems/real life situations?

Many thanks
FuRy

Posts: 2
Joined: Sun Nov 07, 2010 2:53 am

### Re: The ! function

FuRy wrote:I have encountered a problem that says to solve "9!". What is the exclamation point mean and how do you properly use this function in word problems/real life situations?

Many thanks

!= factorial

9!=nine factorial

$9!=9\cdot8\cdot7\cdot6\cdot5\cdot4\cdot3\cdot2\cdot1=362880$

How many ways can you arrange 9 unique books in a row on a shelf...9! ways

Martingale

Posts: 350
Joined: Mon Mar 30, 2009 1:30 pm
Location: USA