Let S be a non- empty set and P (s) be the power set of set S .Find the identity element for all union ⋃ as a binary operation on P( S) .

Let S be a non-empty set and P(s) be the power set of set S. Find the identity element for all union U as a binary operation on P(S)dot

Define identity element for a binary operation defined on a set.

A binary operation on a set has always the identity element.

Let X be a non-empty set and let * be a binary operation on P(X) (the power set of set X) defined by A*B=AuuB for all A ,\ B in P(X) . Prove that * is both commutative and associative on P(X) . Find the identity element with respect to * on P(X) . Also, show that varphi in P(X) is the only invertible element of P(X)dot

Let * be a binary operation defined on set Q-{1} by the rule a * b=a+b-a b . Then, the identity element for * is

If * defined on the set R of real numbers by a*b=(3a b)/7 , find the identity element in R for the binary operation *.

If * defined on the set R of real numbers by a*b= (3a b)/7 , find the identity element in R for the binary operation *.

Let S={a ,\ b ,\ c} . Find the total number of binary operations on Sdot

The relation is subset of on the power set P (A) of a set A is

If the number of elements in the power set of set A is 128 then find the number of elements in the set A .