another rational expression.
addition and subtraction, you dummy
Yes. Rational functions must contain rational expressions in order to be rational.
a rational function.
Subtraction is not commutative nor associative.
Yes they are closed under multiplication, addition, and subtraction.
No, there is not.
8+3/n
Yes. Rational functions must contain rational expressions in order to be rational.
Rational linear expressions.
Yes. Rational functions must contain rational expressions in order to be rational.
Yes. Rational functions must contain rational expressions in order to be rational.
No.