If * is a binary operation on set Q of rational numbers defined as a*b=`(ab)/5` Write the identity for *, if any

If * is binary operation on set Q of rational numbers defined as a**b=(ab)/(5) . Write the identity for *, if any.

Let * is binary operation on set Q of rational number defined as a**b=(ab)/(2) . Write the identity for *, if any.

Let ** be a binary operation on set Q of rational numbers defined as a ** b= (ab)/8 . Write the identity for ** , If any.

Select and write the correct alternative from those given below: Let * be a binary operation on Q, the set of rational numbers, defined by a*b=(ab)/(2), then * is

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

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

Let ast be a binary operation on the set Q of rational numbers defined by aastb=frac(ab)(3) . Check whether ast is commutative and associative?

Let * be a binary operation on Q_0 (set of non-zero rational numbers) defined by a*b=(3a b)/5 for all a , b in Q_0dot Find the identity element.

Let * be a binary operation on Q_0 (set of non-zero rational numbers) defined by a*b= (3a b)/5 for all a ,\ b in Q_0 . Show that * is commutative as well as associative. Also, find the identity element, if it exists.