1. What is e ?

2. e is an irrational number.
What is e ?
e is an irrational number.

3. e is an irrational number. e ≈ 2.718
What is e ?
e is an irrational number.
e ≈ 2.718

4. e is an irrational number. e ≈ 2.718 e ≈ 2.718281828
What is e ?
e is an irrational number.
e ≈ 2.718
e ≈

5. e is an irrational number.
What is e ?
e is an irrational number.
e ≈ 2.718
e ≈
and, the value of e to a “few” more decimal places :

6. e ≈

7. Why the letter e ?
Leonhard Euler (lay’-ohn-hart oy’ –lur,) 5/15/1701 to 9/18/1783 was born in Basel, Switzerland.
He was one of the most prolific mathematicians in history. He refined the notion of a FUNCTION; made common many mathematical notations including e , i for , the pi symbol (∏) , and the sigma symbol (Σ).

8. How can we compute the value for e?

9. How does your calculator compute the value for e ?

10. And finally …