class 9th math sample paper give me please
A + B = (A \ B) ∪ (B \ A).
Prove the following assertions:
(a) A + (B + C) = (A + B) + C;
(b) A + ∅ = ∅ + A = A;
(c) A + A = ∅
A + B = (A \ B) ∪ (B \ A).
Prove the following assertions:
(a) A + (B + C) = (A + B) + C;
(b) A + ∅ = ∅ + A = A;
(c) A + A = ∅