[" 21.Let "*" be a binary operation on "],[" set "Q" of rational numbers defined "],[" as "a*b=(ab)/(5)" 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.

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.

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

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)^2 find is it commutative?

Let ∗ be a binary operation on the set Q of rational numbers as follows: a*b=(a-b)^2 find is it associative?

Let * be a binary operation defined on the set of non-zero rational number, by a**b = (ab)/(4) . Find the identity element.

Let ∗ be a binary operation on the set Q of rational numbers as follows: a*b=(ab)^2 find is it commutative?