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.

Question

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.

lexy148 · Answer

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

welshfella · Answer

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

lexy148 · Answer

ok okay i get it now

welshfella · Answer

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

lexy148 · Answer

the one that confuses me is number 2

welshfella · Answer

well use [ before the -1 and ) after 1

welshfella · Answer

try it

lexy148 · Answer

k

welshfella · Answer

start with [

welshfella · Answer

because -1 is included in the interval

lexy148 · Answer

it would be like this [-1,1)