<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The number e is a mathematical constant, approximately equal to 2.71828, which appears in many different settings throughout mathematics . It was discovered by the Swiss mathematician Jacob Bernoulli while studying compound interest, where e arises as the limit of (1 + 1 / n) as n approaches infinity . The number e can also be calculated as the sum of the infinite series </P> <Dl> <Dd> e = ∑ n = 0 ∞ 1 n! = 1 1 + 1 1 + 1 1 ⋅ 2 + 1 1 ⋅ 2 ⋅ 3 + ⋯ (\ displaystyle e = \ displaystyle \ sum \ limits _ (n = 0) ^ (\ infty) (\ dfrac (1) (n!)) = (\ frac (1) (1)) + (\ frac (1) (1)) + (\ frac (1) (1 \ cdot 2)) + (\ frac (1) (1 \ cdot 2 \ cdot 3)) + \ cdots) </Dd> </Dl>

Where does the irrational number e come from