
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
September 20th, 2012, 07:41 PM  #1 
Newbie Joined: Sep 2012 Posts: 15 Thanks: 0  How do I express the domain in 'Interval Notation'?
Find domain for the function: f(x)= x+3/x^26x+8 The domain cannot be zero on the denominator so, once expanded it's: Domain: x (cannot equal) 4,2 How would I write that the domain is all real number except 4,2? 
September 20th, 2012, 08:01 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,155 Thanks: 463 Math Focus: Calculus/ODEs  Re: How do I express the domain in 'Interval Notation'?
In interval notation, this would be: 
September 20th, 2012, 08:06 PM  #3  
Newbie Joined: Sep 2012 Posts: 15 Thanks: 0  Re: How do I express the domain in 'Interval Notation'? Quote:
Because once I expand it's (x4)(x+2)=0 So the domain would be 4,2. Do I just express it as: (infinity,4)U(4,2)U(2,infinity) ??  
September 20th, 2012, 08:21 PM  #4 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,155 Thanks: 463 Math Focus: Calculus/ODEs  Re: How do I express the domain in 'Interval Notation'?
You had it right the first time: These are the values we exclude from the domain. 

Tags 
domain, express, interval, notation 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
simplify and express in cartesion notation  Melody2  Complex Analysis  9  October 31st, 2013 08:18 PM 
express each series using sigma notation  snowball364th  Algebra  1  May 15th, 2013 05:57 PM 
Find the 'domain' of the function through 'interval notation  elifast  Algebra  1  September 19th, 2012 02:11 PM 
(a) Express the following statements in logarithmic notation  shellea3  Algebra  2  October 30th, 2011 12:13 PM 
express each series using sigma notation  snowball364th  Calculus  0  December 31st, 1969 04:00 PM 