or

ask mattrab Visit www.askmattrab.com for more academic resources.

Identity Law

Identity

It states that the sum of a variable and 0 is same as the variable itself. Likewise, multiplication of the variable with 1 is same as the variable itself. 
i.e.,
➡ A + 0 = A
➡ A.1= A
Proof:

 

Hence, A + 0 = A & A.1= A.