Question

4. Let A = {xc : x is a multiple of 2 , x < 15),
B = {x : x is a multiple of 3, x < 20),
C = {x : x is a prime, x < 20}.
Write each one of the sets A, B, C in Roster form.
(i)
(ii) Find :
(a) A U B
(b) A U C
(c) B u c
(d) A ∩ b
(e) A ∩ b
(f) В ∩ c
please answer this correctly and please explain the answer
please ​

Answer 1

A= {2,4,6,8,10,12,14}

B= {3,6,9,12,15,18}

C={2,3,5,7,11,13,17,19}

(a) A U B = {2,3,4,6,8,9,10,12,14,15,18}

(b) A U C = {2,3,4,5,6,7,8,10,11,12,13,14,17,19}

(c) B U C = {2,3,5,6,7,9,11,12,13,15,17,18,19}

(d) A ∩ B = {6,12}

(e) B ∩ C = {3}