It is given that ξ = {x: x is a positive integer such that 3 ˂ x ≤ 18},
Y = {x: x is a multiple of 3}
Z = {x: x is a multiple of 9}.

(a) List all the elements in ξ, Y and Z in set notation.
(b) Draw a Venn diagram to represent the sets ξ, Y and Z.
(c) From the Venn diagram, find;
(i) Y ∪ Z
(ii) Y ∩ Z

the perimeter is increased by a factor of 2

answer:  

step-by-step explanation:

odd numbers are only divisible by 1 and itself.

even numbers are divisible by more than 1 and itself.

for example 6 is even because it is divisible by more than 1 and its self. 1 x 6= 6 ; 2 x 3= 6

and 7 is odd because only 7 x 1 equals seveb

77

step-by-step explanation: