## jiehanthelearner 2 years ago How Do you write "A is the set of even whole numbers less than 12" in the notation builder?

1. ParthKohli

$\{\mbox{name of the set}:\mbox{condition}\}$

2. jiehanthelearner

can you write it for me? i still don't understand

3. ParthKohli

What do you call the set of even whole numbers?

4. jiehanthelearner

5. ParthKohli

Yes, I am helping ya. :-)

6. jiehanthelearner

Great,Thanks a bunch! you're very nice :D

7. jiehanthelearner

my problem is i don't know how to write it is it like this: A={x|x<...,x $\in$ ...} (note that "...." means i don't know what to put in there)

8. ParthKohli

$2\mathbb Z$is the set of even numbers.

9. ParthKohli

Where are you exactly stuck...?

10. jiehanthelearner

um,i'm stuck in the "..." part.. what should i write there?

11. AravindG

there you should write where the element belongs to

12. AravindG

and also include any condition if present

13. ParthKohli

$$x$$ is more than or equal to $$0$$ and less than or equal to $$12$$.

14. ParthKohli

For example, you can write the set of first ten natural numbers as:$\{x\in\mathbb N: x \le 10\}$

15. jiehanthelearner

i see! Tx you two! you guys are very nice for a newcomer like me,haha! well,Tx Again!

16. ParthKohli

Can you do it now? :-)

17. jiehanthelearner

hmm,kind off... well,Tx!

18. AravindG

for example if you are asked to write set of all even numbers you can write it as A={ x:x=2n ;n $$\in$$ N} N is set oof all natural numbers

19. AravindG

*of

20. AravindG

yw :)

21. ParthKohli

Nah, I'd just use$A = \{x:x\in2\mathbb Z \}$And BTW, @AravindG, it should be the set of integers :-)

22. AravindG

I wanted to make it clear ..in schools we are first taught in that fashion ,then we play with it :) @ParthKohli

23. ParthKohli

But even numbers belong to the set of integers, not only N.

24. AravindG

*corrected :positive even numbers