Q, the set of all rational number, * is defined by `a*b=(a-b)/2` , show that * is no associative.

Q, the set of all rational number, * is defined by a*b= (a-b)/2 , show that * is not associative.

On Q define * by a ** b = (ab)/3 . Show that * is associative.

On Q, the set of all rational numbers a binary operation * is defined by a*b=(a+b)/(2) Show that * is not associative on Q.

On the set Q of all rational numbers an operation * is defined by a*b=1+ab. show that * is a binary operation on Q.

On Q , the set of all rational numbers a binary operation * is defined by a*b= (a+b)/2 . Show that * is not associative on Qdot

On the set Q of all rational numbers an operation * is defined by a*b = 1 + ab . Show that * is a binary operation on Q.

For a binary operation ** on the set of rational numbers Q defined as a** b= (ab)/2 Determine whetler ** is associative

Verify whether the binary operation * on Q, the set of all rationals, defined as a*b=ab+1 is commutative or associative.