- published: 04 Jul 2013
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In mathematics, a real number is a value that represents a quantity along a continuous line. The adjective real in this context was introduced in the 17th century by Descartes, who distinguished between real and imaginary roots of polynomials.
The real numbers include all the rational numbers, such as the integer −5 and the fraction 4/3, and all the irrational numbers, such as √2 (1.41421356…, the square root of 2, an irrational algebraic number). Included within the irrationals are the transcendental numbers, such as π (3.14159265…, a transcendental number). Real numbers can be thought of as points on an infinitely long line called the number line or real line, where the points corresponding to integers are equally spaced. Any real number can be determined by a possibly infinite decimal representation, such as that of 8.632, where each consecutive digit is measured in units one tenth the size of the previous one. The real line can be thought of as a part of the complex plane, and complex numbers include real numbers.
A number is a mathematical object used to count, measure, and label. The original examples are the natural numbers 1, 2, 3, and so forth. A notational symbol that represents a number is called a numeral. In addition to their use in counting and measuring, numerals are often used for labels (as with telephone numbers), for ordering (as with serial numbers), and for codes (as with ISBNs). In common usage, the term number may refer to a symbol, a word, or a mathematical abstraction.
In mathematics, the notion of number has been extended over the centuries to include 0, negative numbers, rational numbers such as and , real numbers such as and , complex numbers, which extend the real numbers by including , and sometimes additional objects. Calculations with numbers are done with arithmetical operations, the most familiar being addition, subtraction, multiplication, division, and exponentiation. Their study or usage is called arithmetic. The same term may also refer to number theory, the study of the properties of the natural numbers.
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Algebra2go Beginning Algebra Video Series. The real number line.
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We are going to discuss about Real Number System in this Mathematics First Lesson
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This video lecture "Number System, Natural, Integer, Rational, Irrational, Real Line & XY Plane in hindi" helps the students of higher secondary class th understand the following topics: 1. Natural numbers 2. Integers 3. Rational numbers 4. Irrational numbers 5. Real Numbers & real line 6. XY-plane and plotting of any point on xy-plane soon we will upload next lecture. For any query please write us on jaipal.vishwakarma@gmail.com or send message on +919301197409(hike & whattsapp) For more updates subscribe our channel " Jaipal Vishwakarma" and join our facebook page "Maths Bhopal"
This Video explains the concepts of Real Numbers and all the problems of Exercise 1.1 of Chapter - 1 Real Numbers.
Aakash iTutor: Class 10th Mathematics Video Lectures (Real Numbers: Rational numbers & irrational numbers) to study through online coaching tablet by Aakash Institute. Enquire for Full Video-Lectures @ (http://www.aakashitutor.com/edu-tab/) and prepare for NTSE and Board Exams. (The full video lecture covers topics related to Real numbers, rational numbers, irrational numbers, Euclid's division lemma, Euclid's division algorithm, fundamental theorem of arithmetic, HCF, LCM, rational numbers and decimal expansions, terminating decimals, non-terminating decimals, recurring decimals and non-terminating decimals.)
This is the video of Class 10 Maths Real Numbers. Topics covered in this video are as follows : Divisibility,Euclid Division Lemma,Euclid Division Algorithm. Here is a demo of online video lecture. You can watch this complete video at http://www.dronstudy.com Alternatively, visit this URL to access this chapter directly http://dronstudy.com/video/class-x-number-sysytem/ ..... All the above mentioned topics are described in an interactive and efficient manner so that the students could easily understand them. Here is the list of important URLs related to dronstudy.com Youtube Video Link: https://www.youtube.com/watch?v=9exHO9iw14c Youtube Channel Link: http://www.youtube.com/channel/UCPiuJvuyMVFSwcIdBCTpTyQ Website Link: http://www.dronstudy.com Facebook Page:https://www.facebook.com/pag...
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We are going to discuss about Real Number System in this Mathematics First Lesson
For full video lessons visit our Website : http://www.eduzon.in/ For Subscribe: https://www.youtube.com/c/eduzonin?sub_confirmation=1 Facebook :https://www.facebook.com/onlinestudyeez You tube channel: https://www.youtube.com/c/eduzonin 10th class science/ 8th class subjects online classes/ 10th class subject videos/ projectt videos/ 9th class biology / social studies/ mathematics/ subject wise videos/ telangana board classes/ sec classes online videos/ download project works/ studies/ student project works/ Physics lab practicals/ latest videos/ educational videos online in youtbe/ 8th class maths in youtube/ social studies subject vidoes/ andhra pradesh ssc videos subjects/ biology classes online videos download/ latest project works/ cbse sample papers/ cbse books/ sample paper/ s...
This video lecture "Number System, Natural, Integer, Rational, Irrational, Real Line & XY Plane in hindi" helps the students of higher secondary class th understand the following topics: 1. Natural numbers 2. Integers 3. Rational numbers 4. Irrational numbers 5. Real Numbers & real line 6. XY-plane and plotting of any point on xy-plane soon we will upload next lecture. For any query please write us on jaipal.vishwakarma@gmail.com or send message on +919301197409(hike & whattsapp) For more updates subscribe our channel " Jaipal Vishwakarma" and join our facebook page "Maths Bhopal"
This Video explains the concepts of Real Numbers and all the problems of Exercise 1.1 of Chapter - 1 Real Numbers.
Algebra I-Lesson #1-Classifying Real Numbers and The Real Number System