homework help =[ im stuck?

Question

Types of numbers??
i need ez definitions
what is a real number?
rational number
irrational number
i missed a week of school =[

Answer 1

www.mathwords.com defines them as :
REAL NUMBER--all numbers on the numbers line, positives, negatives, zero; these have no imaginary parts. Ex: 9; -9; 287; 0 are all real numbers, or integers.
RATIONAL NUMBERS--an integer or quotient of an integer divided by a nonzero integer. Ex: 81 divided by 9=9 are rational numbers.
IRRATIONAL NUMBERS--numbers that canNOT be expressed as a fraction p/q for any integers p and q (like 3/4 if p=3 and q=4); have decimal expansions that do not end or become periodic. Ex.: 1.606695152415291763... is an irrational number.

Answer 2

a real number = WHOLE :) no decimals, nothing ~ haha.
e.g 1, 2, 3, -1, -2, -3..................

rational number = you know EXACTLY what the number is. A fraction is also counted as a rational number.
e.g 1/2, 1/1200, 3, -6, -7.5..........
((for example 8.33333333333333333333333*and going* would NOT be a rational number, as you dont know EXACTLY what the number is))

irrational number = a number which you do not know exactly what it is. these include surds
e.g √2 , √5, 0.111111111111111111111111*and going*......


hope you understand :D

Answer 3

A real number is any number that is not imaginary (an imaginary number has an "i" in it).

A rational number is one that has a clear end. Like, if you have a fraction of 2/5, the decimal equivalent is .4, which has a clear end.

An irrational number is one that has no end. 3/9 written as a decimal is .33333..., with the 3s continuing on forever, making it an irrational number with no end. Some symbols in math, like pi, represent irrational numbers.

Answer 4

Jan is correct. Paper is incorrect on irrational numbers. Any repeating decimal such as .333... or .7777... or even .123456,123456,123456... is a rational number. And each of the above can be represented by p/q where p and q are integers.