" (1) Let'*' be a binary operation on "Q_(0)" and "a*b=(ab)/(4)" then,find the identity element in "Q_(0)

Let * be a binary operation o Q defined by a^(*)b=(ab)/(4) for all a,b in Q,find identity element in Q

*be a binary operation on Q,defined as a**b=(3ab)/5 Find the identity element of *if any.

Let * be a binary operation o Q defined by a*b= (ab)/4 for all a,b in Q ,find identity element in Q

On the set Q+ of all positive rational numbers, define a binary operation * on Q+ by a*b = (ab)/(3)AA (a,b) in Q^(+) . Then, find the identity element in Q for*.

Consider the set Q with binary operation '**' as: a**b=(ab)/(4) . Then, the identity element is:

Let * is a binary operation on [0, ¥) defined as a * b = sqrt (a^(2)+b^(2)) find the identity element.

Let A= Q xx Q . Let'*' be a binary operation on A defined by: (a, b) * (c, d)= (ac, ad + b). Find the identity element of A

Let '**' be a binary operation defined on NxxN by : (a** b)=(ab)/2 . Find the identity element for '**' , if it exists.

Let A= Q xxQ . Let * be a binary operation Defined by: (a,b)*(c,d)= (ac,ad +b). Then (i) find the identity element of (A,*)