Page 221 - Mathematics_Form_Two

Chapter name

19. (a) A ∩ B {}= a (b)

(b) A ∪ B {a,b, c, d, e, f}=

(c) A′∩ B {= d, e, f }
(d) A ∩ B′= {b, c }
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(e) A′∩ B′ = {}

(f) A′∪ B′ = { b, c d, ,e,f }
(c)
20. (a) A′∪ B { 3,= 2, } 4

(b) (A)′ ′= {1, } 2 Mathematics for Secondary Schools

(c) (A ∩ ) B ′= {1, 3, 4 }

21. µ = {2, 4, 5, 6, 8, 5, 9}
22. (a) (A ) 9n ′ = (b) (B) 11n = (d)

23. (a) (i) A′= {− 4,3,1,1,− − } 3

(ii) B′= {− 2, − 1, , 42 , } 5

(iii)
A′∪ B′ = {− 4, − 3, − 2, − 1, 1, 2, 3, 4, } 5
2. A ⊂ B.
(iv) A ∩ B { 2,= − } 0 3. A ∩ B

(v) A ∩ B′= {− 2, 2, 4, } 5 4.

(b) (i) (n A′∪ B )′ = 9

(ii) (An ′∩ ) B = 2

5.
(iii) (An ∩ ) B = 2

24. 115

Exercise 7�5 6. A∪ ′ A

1. (a) ′ A

7. n(B) = 22

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Student's Book Form Two

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MATHEMATIC F2 v5.indd 215