Question

Help!!! Will medal!
For which operations is the set {–1, 0, 1} closed?

Choose all answers that are correct.

A.
addition

B.
division

C.
multiplication

D.
subtraction

Answer 1

do you know what closed means?

Answer 2

1+1=2 is not in the set
1/0 is not defined
-1-1 = -2 is no in the set

Answer 3

@TheEdwardsFamily

Answer 4

no I dont know

Answer 5

so a set is closed with respect to an operation if for ALL elements a,b in the set we have that (a operator b) is in the set

Answer 6

so can you take any two elements of the set and add them together and get another element in the set?

Answer 7

So a and b are correct?

Answer 8

umm con fused

Answer 9

brb

Answer 10

? lol

Answer 11

so you would agree that 1 is in the set right?

then IF it is closed with respect to addition we have 1+1 is in the set, is that true?

Answer 12

All im thinking is numbers whirling in my head! Its annoying!:(

Answer 13

@KamiBug are you good at math??

Answer 14

@Nnesha I need you!

Answer 15

@Directrix

Answer 16

@KamiBug

Answer 17

okay so take one number like 1
first add this one into this set values {-1,0,1} like 1+1 = 2 but 2 is not in the set
then subtract -1-1=?? -2 is not there

Answer 18

zzr0ck3r already explained everything :)

Answer 19

but i dont understand

Answer 20

ok do you agree that 1 is in the set?

Answer 21

i guess

Answer 22

the set is \(\{-1,0,1\}\)

Answer 23

is 1 in it?

Answer 24

I don't want you to guess...

Answer 25

do you see a 1?

Answer 26

yea

Answer 27

ok we are talking about part a) addition

is 1+1 = 2 in the set?

Answer 28

I am asking if 2 is in the set.

Answer 29

no

Answer 30

ok so since we did 1+1=2 and 2 is not in the set, we have that it is not closed with respect to +

Answer 31

ok

Answer 32

you could have used -1 also

-1 is in the set, but -1 + -1 = -2 is not in the set

Answer 33

uh-huh

Answer 34

ok so addition is not closed

what about subtraction?

Answer 35

yes?

Answer 36

why?

Answer 37

guessed

Answer 38

ok im done. good luck man.

Answer 39

okay listen

Answer 40

Not a man

Answer 41

what ever you are, I am done lol

@Nnesha good luck

Answer 42

take a number like oneafter subtraction you get -2 is that on the set