
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
April 19th, 2012, 06:21 AM  #1 
Member Joined: Apr 2012 Posts: 90 Thanks: 0  Changing the range of mod x
Hellow, I have two solutions and am not sure which is right. Let's say I have substituted a for x And I solved a to be 2<a<2. Changing it back to modulus x, 2<x<2 Since mod cannot be negative, 0<x<2 My problem is, I have answers which tell me that it will be 0<x<2 and another tells me that I have to add 2, thus 0<x+2<4. Which is right? Thank you. 
April 19th, 2012, 11:09 AM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Re: CHanging the range of mod x
If you have: then you have two cases from the definition of the modulus: i) ii) >2" /> The intersection of the two cases is: We may also choose to interpret x as the distance of x from the origin, which must be less than 2. So plot the two points two units from the origin as endpoints and take everything in between, but not including the endpoints since the inequality is strict. 

Tags 
changing, mod, range 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
changing order of integration  Doxxik  Real Analysis  1  December 14th, 2012 05:40 PM 
Calculating a position in a range while limiting the range  tale  Computer Science  5  May 23rd, 2012 05:16 AM 
changing difference equation  uterfor86  Applied Math  2  January 28th, 2012 11:01 PM 
Changing the subject of a formula  poochie03  Algebra  1  September 10th, 2011 01:10 PM 
Changing the subject of a formula  chuckienz  Linear Algebra  1  May 6th, 2009 06:23 PM 