Question

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

A) what is \(1+1\)?

Answer 2

2

Answer 3

THX

Answer 4

but there is more then one ansewr

Answer 5

evidently it is not closed under addition
what about \(\frac{1}{0}\)

Answer 6

i don't get it can you make it alittle more clear?

Answer 7

closed means if you perform the operation you get something that is still in the set
it is not closed under addition because 1 + 1 = 2 and 2 is not in your set

Answer 8

it is not closed under division because \(\frac{1}{0}\) is not even a number let alone one of the three numbers in the set

Answer 9

??? im still confused

Answer 10

it is not closed under subtraction because \(-1-1=-2\) again not in the set

Answer 11

what is a set?

Answer 12

@ryguy717

Answer 13

oh

Answer 14

thats disappointing

Answer 15

ok i will

Answer 16

@princed

Answer 17

@mathmath333

Answer 18

@midhun.madhu1987

Answer 19

ANYBODY

Answer 20

i think its division

Answer 21

i guess

Answer 22

None. 1/0 = undefinied, which is not part of set {-1, 0, 1}

Answer 23

thx any other guesses there is more then one anserws

Answer 24

lol i can't spell XD

Answer 25

Addition won't works because 1+1 = 2. 2 is not part of set {-1, 0, 1}.
Subtraction; same reason; 1 - -1 = 2
Division. What I said.

So that left us multiplication.

Answer 26

so division and multiplication? @geerky42

Answer 27

Is 1/0 a part of set {-1, 0, 1}?

Answer 28

idk

Answer 29

Do you see 1/0 in set {-1, 0, 1}?

Answer 30

XD im not that smart

Answer 31

ummm

Answer 32

Ok, this set have three elements: -1, 0, and 1, right?

So is there 1/0 in this set?

Answer 33

umm.... yes?

Answer 34

Really, where? All I see are -1, 0, and 1.

Answer 35

oh then no. as i said, i'm not that smart

Answer 36

Ok, since in division, you can divide 1 by 0, lead us to 1/0.

1/0 is not in {-1, 0, 1}, so this set is not closed under division.

So that left us multiplication.

Answer is multiplication, that's it.

Answer 37

so not divison

Answer 38

No.

Answer 39

no, as in yes there is or no as in yes there isn't?

Answer 40

No division.

Answer 41

Answer is multiplication. That's it.

Answer 42

ok

Answer 43

no other?

Answer 44

None, just multiplication.

Answer 45

ok thx