*' is a binary operation defined on Q (set of rational numbers) such that `a * b = ab/3, show that : (a * b) * c = a * (b * c).

Let * be a binary operation defined on Q, the set of rational numbers, as follows: a*b = a-b, for a , b in Q. Find which of the binary operations are commutative and which are associative.

Let * be a binary operation defined on Q, the set of rational numbers, as follows: a*b = (ab)/4, for a,b in Q Find which of the binary operations are commutative and which are associative.

Let * be a binary operation defined on Q, the set of rational numbers, as follows: a*b = ab^2, for a,b in Q Find which of the binary operations are commutative and which are associative.

Let * be a binary operation defined on Q, the set of rational numbers, as follows: a*b = a^2 + b^2, for a , b in Q Find which of the binary operations are commutative and which are associative.

Let * be a binary operation defined on Q, the set of rational numbers, as follows: a*b =a+ab, for a, b in Q.Find which of the binary operations are commutative and which are associative.

Let * be a binary operation defined on Q, the set of rational numbers, as follows: a*b = (a-b)^2, for a,b,inQ Find which of the binary operations are commutative and which are associative.

Let * be a binary operation on the set Q of rational numbers as follows : a*b = (ab)/4 find is it commutative.

Let ∗ be a binary operation on the set Q of rational numbers as follows: a*b=a-b find is it commutative?

Let ∗ be a binary operation on the set Q of rational numbers as follows: a*b=a-b find is it associative?

Let ∗ be a binary operation on the set Q of rational numbers as follows: a*b=a+ab find is it commutative?