यदि `A = {x in C : x^(4) - 1 = 0}` तथा `B = {x in C : x^(3) - 1 = 0}` है तो (A - B) तथा `A cup B` ज्ञात कीजिए।

Answer

`{-1,i,-1}, {1-1,i,-i,(-1+isqrt3)/(2),(-1-isqrt3)/(2)}`