Verified answer

Hi,

Q1) Find B union D.

B: {−2, −1, 1, 4, 7, 12}

D: {numbers divisible by 3 from 1 to 15}

{12}

{−2, −1, 1, 3, 4, 7, 12}

{−2, −1, 1, 3, 4, 6, 7, 9, 12, 15} <==ANSWER

{ }

Q2) Find C intersection D.

C: {3, 6, 9, 12, 15, 18}

D: {numbers divisible by 2 from 1 to 20}

{2, 4, 6, 8, 10, 12, 14, 16, 18, 20}

{6, 12, 18} <==ANSWER

{2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20}

{ }

I hope that helps!! :-)

1) Your answer is the set that has all the elements from both sets B and D

{−2, −1, 1, 3, 4, 6, 7, 9, 12, 15}

2) You answer is the set that has all the elements that sets C and D have in common

{6, 12, 18}

set D is (3,6,9,12,15)

so combining both B and D in union means combining all of their elements into one set. we get:

{-2, -1, 1, 3, 4, 6, 7, 9, 12, 15}

Intersection means certain elements appear in both sets. Numbers divisible by 2 is simply the even numbers from 1 to 20

{6,12,18}

1) B = {-2,-1,1,4,7,12}

D = {3,6,9,12,15}

B U D = {-2,-1,1,3,4,6,7,9,12,15}

2) C = {3,6,9,12,15,18}

D = {2,4,6,8,10,12,14,16,18,20}

C U D = {2,3,4,6,8,9,10,12,14,15,16,18,20}