Question

All real numbers that are at lest 2 and at most 9

Answer 1

To list all numbers (not just integers) from 2 to 9, use an inequality, either in algebraic notation:
2 <= x <= 9
Or interval notation:
[2,9]

Answer 2

There are an infinite number of those, so it's not possible to list them all.

If you'll settle for a list of all the natural numbers, or all the integersin that range, those are:

2
3
4
5
6
7
8
9