यदि A = {1,2,3,4}, B = {2,4,6,8} तथा C = {3,6,9,12} है तो `(A Delta B) Delta C` का मान ज्ञात कीजिये। जहाँ `A Delta B = (A - B) cup (B - A)`

Answer

{1,8,9,12}