Question

Can anyone help me with Union and Intersection??

Answer 1

yes,maybe i can!

Answer 2

Okay one second let me post the questions.

Answer 3

@radar @hba help me please

Answer 4

for union A \(\cup\) B
write down all the elements in A together will the elements from B. Then take out any duplicates.

for intersection A \(\cap \) B
look at each element in A. If that same element is in B, write it down as part of the answer. Do that for every element in A.

Answer 5

I dont even know how to do this at all.

Answer 6

example:
A= {1,2,3}
B= {1,3,5}
A ∪ B = {1,2,3,1,3,5} but take out the duplicates
A ∪ B ={\( {1,2,3,\cancel{1},\cancel{3},5} \)}
A ∪ B = {1,2,3,5}

Answer 7

example
example:
A= {1,2,3}
B= {1,3,5}
A \(\cap\) B
look at the elements in A: 1 is 1 in B? yes. Keep 1
2 is in A, is 2 in B? no
3 is in A, is 3 in B? yes keep it
we get
A \(\cap\) B ={1,3}

Answer 8

ok so what woulod be the answers for the questions?

Answer 9

I dont even know how to do this at all.

Are you saying you can't write down all the numbers in set A and all the numbers in set B?

Answer 10

wait so how would i do it

Answer 11

Question 1 (Multiple Choice Worth 2 points)

Find A B.
A: {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
B: {−2, −1, 1, 4, 7, 11}

{−2, −1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}

{1, 4, 7, 11}

{−2, −1, 1, 2, 3, 4, 5, 6}

{ }



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Question 2 (Multiple Choice Worth 2 points)

The set O represents the maximum temperatures, in degrees Fahrenheit, recorded in the city of Orlando in a year.

O = {71, 71, 72, 73, 77, 77, 79, 83, 84, 89, 90, 91}

The set T represents the maximum temperatures, in degrees Fahrenheit, recorded in the city of Tampa in a year.

T = {70, 72, 76, 78, 81, 81, 84, 86, 86, 89, 90, 90}

How many elements are in the set O ∪ T?

24

15

5

4



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Question 3 (Multiple Choice Worth 2 points)

Find C D.
C: {2, 4, 6, 8, 10, 12}
D: {numbers divisible by 3 from 1 to 12}

{6, 12}

{2, 3, 4, 6, 8, 9, 10, 12}

{3, 6, 9, 12}

{ }



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Question 4 (Multiple Choice Worth 2 points)

Find B 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}

{ }



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Question 5 (Multiple Choice Worth 2 points)

Find A B.
A: {2, 4, 6, 8, 10, 12}
B: {−2, −1, 2, 4, 7, 11}

{2, 4}

{−2, −1, 2, 4, 6, 7, 8, 10, 11, 12}

{−2, −1, 1, 2, 4, 6, 8, 10}

{ }