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VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Specialist Mathematics => Topic started by: jto1292 on October 31, 2010, 12:09:13 pm

Title: Number subsets...help..
Post by: jto1292 on October 31, 2010, 12:09:13 pm: Okey. I'm always confused with this one... WHAT numbers are included in the conventional number subsets... i.e. k is element of C means it occurs in Complex region. I know R is reals. What is included under Z, J and others the might be of importance in this exam?

Thanks for help/
Title: Re: Number subsets...help..
Post by: jasoN- on October 31, 2010, 12:29:52 pm: N: Natural (R+ integers, may include 0)
J=Z (use Z): Integer (-3, -2, -1, 0, 1 , 2, 3, etc)
Q: Rational (fractions)
R: Real
C: Complex

ie. $N \in Z \in Q \in R \in C$
most likely we'll only need to use Z and C
Title: Re: Number subsets...help..
Post by: jto1292 on October 31, 2010, 03:28:09 pm: Thank-you Jason! :) Very useful.. Another thing, do you know the subset for positive whole numbers excluding zero?
Title: Re: Number subsets...help..
Post by: jasoN- on October 31, 2010, 03:30:28 pm: Natural numbers (N) usually are R+, but sometimes people include 0, doesn't really matter.
Natural numbers refer to positive integers (1, 2, 3 etc) or non-negative integers (therefore 0, 1, 2, 3) i believe
Title: Re: Number subsets...help..
Post by: jto1292 on October 31, 2010, 03:31:37 pm: Thank-you very muchly! In it goes into the summary book.
Title: Re: Number subsets...help..
Post by: 3Xamz on October 31, 2010, 03:40:30 pm: For your last question, I like to say J+ which is all positive whole numbers excluding zero