College Algebra / Unit 8 Alg 420 short lesson, about 20 seconds
The Number e
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The idea
The number e is the value that (1 + 1/n)ⁿ approaches as n grows without bound — approximately 2.71828, and irrational.
In practice
At n = 1 the expression is 2; at n = 12, about 2.613; at n = 365, about 2.7146 — climbing toward a ceiling it never quite touches.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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