Wednesday

October 1, 2014

October 1, 2014

Posted by **Jen** on Sunday, July 10, 2011 at 11:22pm.

Z = {16, 17, 18, 19, 20}

I'm so confused with this....please help :(

- Math -
**Reiny**, Sunday, July 10, 2011 at 11:25pmdo it the same way I just showed you in the other post.

the numbers are between 15 and 20, and they are natural numbers.

- Math -
**Jen**, Sunday, July 10, 2011 at 11:27pm{x | 15 < x < 20, x ∈ N} ??

- Math -
**Jen**, Sunday, July 10, 2011 at 11:30pmor would it be this {x | 15 < x < 20, x ∈ z} ???

- Math -
**Reiny**, Sunday, July 10, 2011 at 11:38pmThat would work, except say 15<x<21, that was my error.

I would use x ∈ N , since the numbers 15 and 20 were not part of the set Z

or you could say

{x | 16 ≤ x ≤ 20, x ∈ z}

btw, I should have had the original above as

{x | 15 < x < 21, x ∈ N}

The way I had it, the 20 would have been excluded.

- Math -
**Jen**, Sunday, July 10, 2011 at 11:44pmSo your saying this question:

Express the following in roster form: Set M is the set of natural numbers between fourteen and nineteen, would be

{x | 15 < x < 21, x ∈ N} ??

- Math -
**Reiny**, Sunday, July 10, 2011 at 11:58pmPlease read my replies above including the correction

you want the numbers 16,17,18,19,20

they can be expressed

either as

16≤x≤20 , x∈N

or

15<x<21, x∈N

**Answer this Question**

**Related Questions**

Math-geometry - I do not understand set-builder notation..... Using correct ...

college math - Using correct mathematical notation and symbols, express the ...

Math-Is this right Reiny? - Using correct mathematical notation and symbols, ...

math - How do I start off this equation? Using correct mathematical notation and...

I don't understand this.... - I do not understand set-builder notation..... ...

algebra - is this right solve the following inequality and write solutin as a ...

Math - Express each set in set-builder notation: Set D is the set of natural ...

Math - Could someone please help me with this math problem? Solve using the ...

algebra - mineral=aluminite, cryptohalite, fluorannite, graphite, titanium, ...

math - Solve -3(x-10)>-x+5. Write your solution using set builder notation. ...