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Sunday, 14 April 2019

What is Real Numbers?


Real Number is just simple number like positive integers, negative integers, large numbers, small numbers, whole numbers, decimal numbers they all are Real numbers.

For Example, 0, 1, 152, 15.256, -0.155, ¾, Ï€, √2, etc.

Note: All the Real Numbers are Includes

As you know Real Numbers, okay. The Question Arise?

  Ø  How to represent the Real Numbers on Number Line.

         Here is the Number line (Geometric line), as you see the point “O” which is called as “origin”.

         The Origin point “O” has two directions –

    ü  Left Direction (Negative Direction)
    ü  Right Direction (Positive Direction)

Left Direction has negative numbers or negative points.
Right Direction has positive numbers or positive points.


A distance is chosen to be "1", then whole numbers are marked off: {1, 2, 3...}, and also in the negative direction: {..., −3, −2, −1}

Any point on the line is a Real Number:

    ü  The numbers could be whole number (like 2, 3)
    ü  The numbers could be rational number (like 20/9, -15/4)
    ü  The numbers could be irrational number (like Ï€, e)

As you know, How to represent Real Numbers on number line, okay. The Question Arise?

    Ø  Why are they called "Real" Numbers?
    ü  Answer is – Because they aren’t Imaginary Numbers.

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