What Is A Rational Number What Is A Rational Number
A rational number is any number that can be represented on a number line. for example 2 is a rational number. the square roots of most numbers are not. if you have a number line and you can put the number on it, somewhere, it is a rational number. Any number which can be expressed in the form p/q, where p and q are positive or negative integers and p can be zero, bjut not q, is a rational number. As 10 = 10/1, where p = 10 and q = 1 are integers => 10 is a rational number. Thus, all integers, fractions, recurring decimals, are rational numbers. A number of the type √2 is an irrational number as it can be proved that √2 cannot be expressed in the p/q form. Also, irrational numbers will be such fractions that they cannot be expressed as decimal or recurring decimal number. If one tries to express √2 in the decimal form, it is a never ending decimal number and there is no recurring pattern too. Know More About How To Solve Limits
Tutorcircle.com
Page No. : 1/4
In mathematics, a rational number is any number that can be expressed as the quotient or fraction a/b of two integers, with the denominator b not equal to zero. Since b may be equal to 1, every integer is a rational number. The set of all rational numbers is usually denoted by a boldface Q (or blackboard bold , Unicode ℚ), which stands for quotient. The decimal expansion of a rational number always either terminates after a finite number of digits or begins to repeat the same finite sequence of digits over and over. Moreover, any repeating or terminating decimal represents a rational number. These statements hold true not just for base 10, but also for binary, hexadecimal, or any other integer base. A real number that is not rational is called irrational. Irrational numbers include √2, π, and e. The decimal expansion of an irrational number continues forever without repeating. Since the set of rational numbers is countable, and the set of real numbers is uncountable, almost all real numbers are irrational. The rational numbers can be formally defined as the equivalence classes of the quotient set (Z × (Z ∖ {0})) / ~, where the cartesian product Z × (Z ∖ {0}) is the set of all ordered pairs (m,n) where m and n are integers, n is not zero (n ≠ 0), and "~" is the equivalence relation defined by (m1,n1) ~ (m2,n2) if, and only if, m1n2 − m2n1 = 0. In abstract algebra, the rational numbers together with certain operations of addition and multiplication form a field. This is the archetypical field of characteristic zero, and is the field of fractions for the ring of integers. Read More About Irrational Numbers Worksheet
Tutorcircle.com
Page No. : 2/4
Finite extensions of Q are called algebraic number fields, and the algebraic closure of Q is the field of algebraic numbers. In mathematical analysis, the rational numbers form a dense subset of the real numbers. The real numbers can be constructed from the rational numbers by completion, using Cauchy sequences, Dedekind cuts, or infinite decimals. The term rational in reference to the set Q refers to the fact that a rational number represents a ratio of two integers. In mathematics, the adjective rational often means that the underlying field considered is the field Q of rational numbers. Rational polynomial usually, and most correctly, means a polynomial with rational coefficients, also called a “polynomial over the rationals”. However, rational function does not mean the underlying field is the rational numbers, and a rational algebraic curve is not an algebraic curve with rational coefficients. The set of all rational numbers is countable. Since the set of all real numbers is uncountable, we say that almost all real numbers are irrational, in the sense of Lebesgue measure, i.e. the set of rational numbers is a null set. The rationals are a densely ordered set: between any two rationals, there sits another one, and, therefore, infinitely many other ones
Tutorcircle.com
Page No. : 2/3 Page No. : 3/4
Thank You
TutorCircle.com