## lexy148 one year ago i need help with the following: Convert the following descriptions of numbers into interval notation. 1. All positive numbers not including 0. 2. Every number between -1 and 1 including -1 but not 1. 3. Every number between 1 and 5 not including 2 or 3, but including 1 and 5.

1. lexy148

ok i just dont understand how to do it can you give me an example

2. welshfella

ok all positive numbers including 2 and above would be [2, INF)

3. lexy148

ok okay i get it now

4. welshfella

u can use symbol for infinity also $[2,\infty)$

5. lexy148

the one that confuses me is number 2

6. welshfella

well use [ before the -1 and ) after 1

7. welshfella

try it

8. lexy148

k

9. welshfella

10. welshfella

because -1 is included in the interval

11. lexy148

it would be like this [-1,1)