justify the statement using an example-1.Rational numbers are closed for multiplication.2.Rational numbers are not associative for division.3.Rational numbers are commutative for multiplication.
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Rational numbers are closed under addition , Suntraction and multiplication...means if we take any two rational numbers then their sum , difference and product is again a rational number...
For example :
a = 4 ( rational number ) , b = 0 ( rational number )
=> a +b = 4+0 = 4 is a rational number
=> a-b = 4 - 0 = 4 is a rational number
=> a × b = 4 × 0 = 0 is a rational number
Multiplication of rational numbers is commutative.
If a/b and c/d are any two rational numbers,
then (a/b)x (c/d) = (c/d)x(a/b).
5/9 x 2/9 = 10/81
2/9 x 5/9 = 10/81
Hence, 5/9 x 2/9 = 2/9 x 5/9
Therefore, Commutative property is true for multiplication.
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