Question

{x | x E N and x < 8}

Express set using the roster method

Answer 1

{1,2,3,4,5,6,7}

Answer 2

8 9 10 11 tweee..eee...e..e..eee.eee.eeellve

Answer 3

i forget what that was off of

Answer 4

Sesame Street... :P

Answer 5

the trick here is that N is not well defined set; some include 0 and others do not

Answer 6

the E is a symbol that looks like and E just can't type it

Answer 7

e means element in this case

Answer 8

x e N

Answer 9

ok

Answer 10

Usually for mathematical reasoning classes, 0 is not included in N

Answer 11

element of a set

Answer 12

or else its a backwards E that means every

Answer 13

This question is complete gobbly gook to me

Answer 14

write out the number that are elements of the Natural set that are less than 8

Answer 15

what does the xlx mean

Answer 16

x | x e N

x such that x is an element of N

Answer 17

so x is part of N and less than 8

Answer 18

yes

Answer 19

the "and" having a specific math meaning

Answer 20

\[{x|x \in \mathbb{N} and x<8}\]

Answer 21

ok i think lol

Answer 22

the latex seems to be crowding up lately

Answer 23

I've noticed that too.

Answer 24

yes it looks like that

Answer 25

I wish I understood this stuff better

Answer 26

notation is just another language, you have to practice it to get better :)

Answer 27

its simply saying; write all the natural numbers that are less than 8

Answer 28

I need a symbol chart/book for dummies

Answer 29

ty

Answer 30

It's really cool once you get it down... makes note taking so much faster without having to write all that stuff out.

Answer 31

right

Answer 32

Ready for more?

Answer 33

I can do 1 maybe 2 more before I have to go.

Answer 34

ok ty so much

Answer 35

\[5 \epsilon \left\{ 2,4,6,...,20? \right\} this is false? \right\]

Answer 36

5 E (2,4,6,...,20) false set right

Answer 37

this is a t/f and you are asking if 5 is in that set?
if that's the case, you are right... that is false.

Answer 38

36\[\notin\] 1,2,3,4,5... 40 is true correct

Answer 39

Well thank you I at least understand the set thing a little woo

they are counting by 1's so 36 is included in the set

Answer 40

false because of the stupid E thing errrr

Answer 41

I think I understand the straight forward ones thank you so much

Answer 42

right it is flase because you have the "is not an element" symbol

and you are welcome. I'm glad I could help.

Answer 43

You have and awesome night

Answer 44

thanks :) you too!

Answer 45

Last one before I go :P
and just a hint...
is 21 less than 21?

Answer 46

no

Answer 47

then 21 is not in the set and the "not in the set" operator means this statement is true :)

Answer 48

see with just the numbers \i can read and understand it it's the other stuff that screw's me up

Answer 49

x is in the set of N; x is less than 21

Answer 50

but all of it is not and element

Answer 51

21 E(crossed out) )x E N; x<21)

Answer 52

\[21 \notin \left\{ x|x \in \mathbb{N}/ and/ x < 21 \right\}\]

Answer 53

that is what you are looking for right?

Answer 54

yeah that is close only the one X at the beginning, does ; equal and

Answer 55

I have to determine if it is true or false so x is part of the set of N and x is less than 21

Answer 56

ok... basically the same though, so your set is
{1,2,3,...,20}
21 is not in that set and the statement is that 21 is not in the given set.

Answer 57

because at the end it is less than 21?

Answer 58

right and since you are dealing with Natural numbers, as defined, the set only goes up to 20.

Answer 59

ok ty very much my brain is now bleeding lol

Answer 60

I hear ya. I have some homework to hemorrage by when I get home myself lol
So I'm off. Take care and good luck.

Answer 61

And thanks for taking the time to try and explain these things to me, ever need help with English I can help :) Math NO nite

Answer 62

nite :)