i mean that in math there is a term that is ''real numbers'' but i dont know what it means.
2007-09-23 07:13:01 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
A real number is any number that lies on the number line.
Examples are:-
7 , 85 , √47 , 5 / 8 , 0.429 ,- 7 , - 29 / 2 etc
2007-09-24 21:34:02 · answer #1 · answered by Como 7 · 2⤊ 0⤋
You can't understand what real numbers are until you take a course in advanced analysis in university. The definition is too complicated. So for now, just think of real numbers as anything you can write out as some sort of decimal, even if the decimal never ends.
e.g. 241908209810.249018209481029840192840981...
3.33333333333333333333
3
2
7.5
sqrt(41)
etc.
If you want the precise definition, it's a complete, archimedean, ordered field.
2007-09-23 14:20:42 · answer #2 · answered by Anonymous · 0⤊ 0⤋
It is all the numbers that can be expressed numerically, without resorting to an imaginary part (those are complex numbers).
Real is the combination of the rational and irrational numbers (irrationals cannot be expressed in a simple ratio, and go one with infinite decimals, like e or Pi); rationals are all those numbers that can be expressed as a ratio of other rational numbers, and that also include whole numbers (integers).
2007-09-23 14:18:51 · answer #3 · answered by Vincent G 7 · 1⤊ 0⤋
It's just like it sounds... any number that's real. Whole numbers, fractions, etc are all real... anything you can calculate.
Non-Real ones (or was it "unreal"... I don't recall the term) are the ones that would give you an error on a calculator. For example, anything divided by 0 is a non-real number.
2007-09-23 14:18:32 · answer #4 · answered by Anonymous · 1⤊ 0⤋
Real numbers are the ones which lie on the number line.In mathematics, the real numbers are intuitively defined as numbers that are in one-to-one correspondence with the points on an infinite line—the number line. The term "real number" is a retronym coined in response to "imaginary number". Together with the p-adic numbers, the reals are a limit set of the rational numbers.
2007-09-23 14:18:29 · answer #5 · answered by M. G. Desai 1 · 1⤊ 1⤋
Real numbers are any numbers that aren't imaginary or complex. If the number can be represented without i (which is the square root of -1), then it is real. Real numbers have the property of being representable with decimals, even though some of them can only be approximated by a finite number of digits.
2007-09-23 15:02:06 · answer #6 · answered by Anonymous · 0⤊ 1⤋
The real numbers includes all integers, positive and negative; all fractions; and the irrational numbers, those whose decimal expansions never repeat.
2007-09-23 14:17:56 · answer #7 · answered by Christine P 5 · 0⤊ 0⤋
real numbers are numbers that you would actualy count with...no decimals, fractions, or negative numbers. I like to think of it as if you were playing hide n seek n you were counting...you wouldnt say 1/5, .75, 5.23
you would say 1, 2, 3, 4, etc...
2007-09-23 14:21:50 · answer #8 · answered by Sara 2 · 0⤊ 2⤋
a real number is any number, integers, zero, twenty seven etc.
2007-09-23 14:18:14 · answer #9 · answered by Layla 2 · 0⤊ 0⤋