Question

If N = {positive integers} and subset C = {positive even integers}, what is C′?

{1, 3, 5, 7, …}

{ }

{… −7, −5, −3, −1}

{2, 4, 6, 8, …}

Answer 1

{1,2,3,4....}-{2,4,6,....} =?

Answer 2

?

Answer 3

There a two families or set of integers or whole numbers. The first set, is the even numbers and the next is odd numbers {1, 3, 5, 7, 9,.......} See if you can continue this set?

Answer 4

Is it C.?

Answer 5

or A.?

Answer 6

{1,2,3,4....}-{2,4,6,....} =?
So you knock out 2,4,6 etc from the first one, you are left with what?

Answer 7

1,3,5,7...

Answer 8

Is that right?

Answer 9

Don't you know?

Answer 10

Um no

Answer 11

Better, why don't you know?

Answer 12

I think its A. or C. but im not sure.

Answer 13

Hey, I'm.confused now too:)

That is the positive odd numbers.

Also, you have the positive even numbers too!
Then, the negative odd and negative even numbers too.

Answer 14

Ok, we are starting out with

N = {positive integers}

That's what it says in the question.

Agreed?

Answer 15

Yes

Answer 16

Well Sam the first example that I gave was the correct awnser.

Answer 17

OK, So that's {1,2,3,4...}
Agreed?

Answer 18

We are trying to see how to get the answer, not just give the answer (ideally)

Answer 19

Yes

Answer 20

Then the question says that we have a subset (ie a part ) of the one we just looked at...

Agreed?

Answer 21

Yep

Answer 22

That part is {2,4,6,....}Right?

Answer 23

mhmm

Answer 24

That a yes?

Answer 25

Yes

Answer 26

Right, the C' is basically saying what is left in the first set after you took away the second one....

Answer 27

That's the only tricky bit.....

Answer 28

ie N= C +C'

Answer 29

When all sets under consideration are considered to be subsets of a given set U, the absolute complement of A (denoted A') is the set of all elements in U but not in A.

Answer 30

Which is why my first reply was

{1,2,3,4....}-{2,4,6,....} =?

Answer 31

Get it or not?

Answer 32

Yea i understand now thanks a lot

Answer 33

ur welcome