Finding cube root is the inverse operation of finding the _____ .
A division is the inverse operation of a square.
Let A = R × R and * be a binary operation on A defined by (a,b) * (c, d) = (a + c, b + d). Show that * is commutative and associative. Find the identity element for * on A. Also, find the inverse of every element (a, b) ϵ A.