Question

Let A = {1, 2, 3, 4,}, B = {3, 4, 5, 6, 7}, and C = {2, 3, 5, 7}

Find: B∩C

Answer 1

ignore A, it has nothing to do with it

Answer 2

pick the number that are in both B and C

Answer 3

3,5

Answer 4

\[B\cap C\] means in B AND in C

Answer 5

2, 3, 4, 5, 6, 7 are all of the numbers between B and C.

Answer 6

3,5 are both in b and c

Answer 7

so is 7

Answer 8

both dear, pick the numbers in both
you have not received a correct answer yet, from either @Troy121101 or @Mrs.ambrose614

Answer 9

thhaanks so when finding a set basically look at the numbers that are both in the set

Answer 10

Yep so would it be all three of these 3,5,7

Answer 11

3, 5, and 7 then?

Answer 12

yes

Answer 13

"thhaanks so when finding a set basically look at the numbers that are both in the set"
NO, not when "finding a set" when finding the intersection \(\huge \cap\) of two sets

Answer 14

confused can you explain this alittle more @satellite73

Answer 15

yes
the symbol \(\cap\) reads "intersection" or "intersect" so for example \[A\cap B\] reads "A intersect B"
the elements of \(A\cap B\) are the elements, numbers, whatever, that are in both A AND B

Answer 16

A∪B∪C can you also explain this?

Answer 17

so for example if \[A=\{\spadesuit, dog, \heartsuit, cat, lemon, orange\}\] and \[B=\{giraffe, \heartsuit, monkey, orange, dog\}\] then \[A\cap B=\{ \heartsuit, orange, dog\}\]

Answer 18

ohhhhhh

Answer 19

A∪B∪C is a big set, it is all the stuff either in A or in B or in C
everything

Answer 20

ok so im gonna do this problem and see if can do it then ill ask you if i did it right it doesnt seem hard so one sec

Answer 21

thak you again

Answer 22

ok
btw \(\huge \cup\) reads "union"

Answer 23

\[A\cup B\] is the stuff in A or in B or in both

Answer 24

with the union set i do the same like the intersection set ? its just a bigger group?

Answer 25

no, union is not intersection , that is why there is a different symbol for it doh

Answer 26

iknow but like you saiid A∪B∪C is a big set, it is all the stuff either in A or in B or in C
everything thats why i was asking

Answer 27

\[A=\{\spadesuit, dog, \heartsuit, cat, lemon, orange\}\]\[B=\{giraffe, \heartsuit, monkey, orange, dog\}\]\[A\cup B=\{ \spadesuit, dog, \heartsuit, cat, lemon, orange, giraffe, monkey\}\]
EVERYTHING

Answer 28

yeah a big set, everything

Answer 29

ohhh so everything in the sets

Answer 30

yes everything for union

Answer 31

ok so i did Let A = {1, 2, 3, 4,}, B = {3, 4, 5, 6, 7}, and C = {2, 3, 5, 7}

Find: A∪B∪C

Answer 32

and my answerr

Answer 33

of you see a number, write it

Answer 34

is 1,2,3,4,5,6,7

Answer 35

7

Answer 36

oh wait 7 isnt my answer that was an accident

Answer 37

yes all the stuff

Answer 38

1, 2, 3, 4, 5, 6,7

Answer 39

ok great ! thank you so mucho

Answer 40

yw