Question

verify the closure propertyfor addition and multiplication of the rational numbers -5/7 and 8/9

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Answer 1

Answer:

For addition

Closure property means that the sum for 2 rational numbers is a rational number only

-5/7+8/9

11/63 is a rational umber

Hence, proved that addition is closed under rational numbers

For multiplication

-5/7*8/9

-40/63 is a rational number only

Hence proved again that multiplication is closed under rational numbers.