ONE IDEA:
If is between 2 and 3,
then means that , which means
So is a solution, and so are , , and .
FANCIER IDEAS:
You probably know that is an irrational number that is between 3 and 4.
So means that . is another irrational number between 2 and 3.
FANCIER:
You may not know it, but there is an irrational number called that is approximately 2.7183.
It is sort of like in that there is no other way to express it, and to describe it you have to tell a story. However, the story of is more complicated than the story of .