Question

For which operations is the set {0, 1} closed?

Choose all answers that are correct.

A.
multiplication

B.
division

C.
addition

D.
subtraction

Answer 1

Closed over multiplication in this problem would mean that if you computer 0*0, 0*1, or 1*1, then you would always get back as the answer one of the two elements in the set, that is you'd always get 0 or1.

So, if you do all those multiplications, do you always get 0 or 1 back?

Then, you have to test division next.

Answer 2

so a and d

Answer 3

@ineedurhelpnow under what topology?

Answer 4

On subtraction, then what would happen if you did the calculation 0 - 1? Would you get 0 or 1 as the answer?

Answer 5

@ineedurhelpnow You need to reconsider you answer of d.

Answer 6

ok then what do you think it would be

Answer 7

First, what is the number zero with one subtracted from it equal to? Is it 0 or 1 ?

Answer 8

-1

Answer 9

Yes. Is negative one a member of the original set?

Answer 10

So is the set closed under subtraction?

Answer 11

uhhhhhh i think

Answer 12

It is* not closed* under subtraction because we took two elements of the set, subtracted one from the other, and got an answer that was not in the set.

Answer 13

That leaves just A as the answer.

Answer 14

Question?

Answer 15

@Directrix

Answer 16

First, close this thread and then post the question in a new thread.
Once you do that, I'm going to ask if you know how the set of whole numbers looks.

Answer 17

Which equations show that the set of whole numbers is closed under addition?

Choose all answers that are correct.
A.
0 + (–1) = –1
B.
1 + 1 = 2
C.
2 + 0 = 2
D.
2 + (–1) = 1

Answer 18

a. 0 + (-1)=-1
d.2+(-1)=1

Answer 19

@Directrix

Answer 20

ok can u just give me the answer this test is timed

Answer 21

WHOLE NUMBER

Definition of Whole Numbers

The numbers in the set {0, 1, 2, 3, 4, 5, 6, 7, . . . . } are called whole numbers.

In other words, whole numbers is the set of all counting numbers plus zero.

http://www.icoachmath.com/math_dictionary/whole_numbers.html

Answer 22

please just tell me i know what a whole number is

Answer 23

Whole numbers are not negative.

So, both of these are WRONG.

Answer 24

so its b,c,d

Answer 25

ok i got 45 more sec on this question

Answer 26

tellllllllllllllll meeeeeeeeeeeeeeeeee

Answer 27

A is wrong because -1 is not a whole number.

Answer 28

ok

i have 5 min on this question
Which sets of numbers are closed under subtraction?

Choose all answers that are correct.

A.
odd natural numbers

B.
rational numbers

C.
{0, 1}

D.
{0, 1, 2}
can u just give me the answer that would help

Answer 29

@Directrix

Answer 30

HELLLLLLLLLLLLLLLLLLLLLLLLLLLLLP

Answer 31

@Directrix

Answer 32

I cannot feed you answers on this site because it is against the Code of Conduct.

Answer 33

well HELPPPPPPP and ppl do it all the time

Answer 34

2

Answer 35

ok

Answer 36

The rational numbers are closed under subtraction. There is no easy way to show that.
B is correct.

Answer 37

What about this: C. {0, 1}

What is the answer to 0 - 1 ? Is that answer a member of the given set?

Answer 38

-1

Answer 39

So, no. C is not the correct answer.

Answer 40

so it is d and b

Answer 41

So, far. we have that B is the only correct answer. But, we are not finished.

Answer 42

Numbers p and q are positive integers.

Which statements are always true?

Choose all answers that are correct.

A.
p + q is a positive integer

B.
p – q is a negative integer

C.
p • q is a positive integer

D.
is a positive integer

Answer 43

{0, 1, 2}

What is the answer to 1-2 ? Is that a member of the given set?

Answer 44

-1

Answer 45

yasssssss it has to be more than one hun

Answer 46

yeah could you help
with
Numbers p and q are positive integers.

Which statements are always true?

Choose all answers that are correct.

A.
p + q is a positive integer

B.
p – q is a negative integer

C.
p • q is a positive integer

D.
is a positive intege

Answer 47

@Directrix