Irrational Number chapter 1 can study by students of class 9. These definitiona and formulas of Class 9 Maths Chapter 1: Number System is developed and witten by our expert teachers. Maths formulas. Irrational Number is prepapred and collected from varius resources to help the students.
Irrational number :-
Numbers that cannot be put in the form of p/q , where q is not equal to 0
When p and q both are integers
Example √2 , √5 and √8 etc
Every fraction is a rational number but a fraction need not be a rational number.
Standard form of rational number :-
A rational number is said to be in the standard form if q is positive integer and the integers p and q have no common divisor other than 1.
Example 2/5 , 7/9 etc
We can find as many rational numbers between x and y using the formula (x+y)/2
If x and y are any two rational numbers, then :
Sum or difference of two x and y will always rational
And product or division of x and y will always rational
If one variable is rational and other is irrational in x and y then
Sum or difference of two x and y will always irrational
And product or division of x and y will always irrational
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