## Biancao9o3o12 2 years ago 10. How do you write “M is the set of whole numbers that are less than 5” in roster form? In set-builder form? please help with this question ?

1. saloniiigupta95

This set would be represented by, let it be called set A, then, A= {0, 1, 2, 3, 4}

2. Biancao9o3o12

Thanks !

3. saloniiigupta95

My pleasure :-)

4. saloniiigupta95

Is it clear to you??? I hope you have no doubts... If you have any, you can discuss.

5. amistre64

they used to call the list of names that the teacher would call at the start of class a "roster". Roster form is simply naming all the elements one by one; or using the ... as needed

6. amistre64

set builder notation uses "equations" or inequations to define the set and can involve "ors" and "ands"

7. saloniiigupta95

Okay, then the exact solution would go like this- Roster form shows all the elements of the set , in curly brackets, A= {0,1,2,3,4} Set Builder form depicts the properties defining the elements of the set, A= {x: \[ 4 \ge x \ge0\] and \[xin\mathbb{N}\]

8. saloniiigupta95

Sorry , latex error, this "in" signifies "belongs to"

9. Biancao9o3o12

tHANKS (:

10. Biancao9o3o12

Can you help me on another one ?

11. saloniiigupta95

Ya, bring it on...

12. Biancao9o3o12

What are the solutions of : e. 2(t -1) + 3t < 2 f. 4n +2 < 7(n – 13) g. 14 – 6n ≤ 2 (7-3n) h. 4p + 3 > 9p +6 -5p

13. saloniiigupta95

Check the first one, simplify by opening braces, 2t - 2 + 3t < 2 i.e., 2t + 3t < 4 i.e., 5t < 4 which gives t < 4/5 t∈(-∞,4/5) gives us the solution set...

14. saloniiigupta95

Be careful about using Round braces (.) or Square braces [.] because they have different meanings, (.) signify that the end points are NOT included, and [.] signify they are contained , like above , infinity and 4/5 are NOT contained, ( INFINITY CAN NEVER BE CONTAINED IN A SET)

15. amistre64

OpenStudy policy is: It is better to guide the user to an answer rather than doing all the work yourself. We discourage giving out answers without letting the asker at least take some part in the analysis - the aim of this site is to teach. Please refer to our code of conduct at http://openstudy.com/code-of-conduct for more information. Thank you.

16. amistre64

17. saloniiigupta95

But she is NOT replying to my posts, and further this is an example, intended to be used for other parts by herself... Even I am not good at typing much..

18. Biancao9o3o12

19. saloniiigupta95

Solution is already there @Biancao9o3o12 ...

20. Biancao9o3o12

Oh okay thanks !

21. saloniiigupta95

Now solve other parts by yourself @Biancao9o3o12 ... Thanks @amistre64

22. Biancao9o3o12

It's cause I don't really get this ;'c