Question

Rational numbers are always closed under subtraction .Any rational number with 0 as denominator is not defined ( false / true )

Answer 1

Answer:

Step-by-step explanation:

it is true.

the difference of two rational numbers is always a rational number.

x / 0 is not defined for x # 0.

Answer 2

Answer:

Step-by-step explanation:

Rational numbers are always closed under subtraction

true

if a and b are two Rational numbers

  then a - b also Rational numbers  

Any rational number with 0 as denominator is not defined

true  

a/o is not defined  where a is not o  

also note

a/o is also not defined if a= 0