Math 41. Every rational number is also
(a) a natural number (b) an integer
(c) a w
3-21
42. Ifa - ib =
then a2 + b2 =
3+21
4
(a) 1
(b)
(c)
(d)
43. Given U = {1,2,3,...,15), A = {x: x 28}, B = {x: x S
(a) Ø (b) U (c) AUB (d) None of these
44. Which are the equal ordered pairs ?
(a) (2,4), (4,2) (b) (2,2), (4,+)
(c) (4,2), (4,2)​