JAMB - Mathematics (1992 - No. 8)
If x = (all prime factors of 44) and y = (all prime factors of 60), the elements of X ∪ Y and X ∩ Y respectively are
(2, 4, 3, 5, 11) and (4)
(4, 3, 5, 11) and (3, 4)
(2, 5, 11) and (2)
(2, 3, 5, 11) and (2)
Spiegazione
x = (all prime factors of 44) and y = (all prime factors of 60)
∴ x = (2, 11), y = (2, 3, 5)
X ∪ Y = (2, 3, 5, 11),
X ∩ Y = (2)
∴ x = (2, 11), y = (2, 3, 5)
X ∪ Y = (2, 3, 5, 11),
X ∩ Y = (2)