e is defined as the limit as n
approaches infinity of
(1 + 1/n) ^ n.
So e = 2.718281828459045 ...
e can also be defined as the limit as n
approaches zero of
(1 + n) ^ (1/n).
e is the base of the exponential function y=a^x
such that the slope of the tangent to the curve
at the point (0,1) is 1. -- Bill Turner
You can remember this approximation
for e by recalling some facts about
Andrew Jackson.
He was elected twice as
President of the U.S.
He was the seventh
President of the U.S.
He was first elected in 1828.
Since he served two terms, write
down another 1828.
He was a general in the War of 1812
and won the battle of New Orleans.
He wore a pair of 45s on his
hips, and 45 + 45 = 90. So
the next 6 digits are 459045.
Some mnemonics for e:
It enables a numskull to memorize a quantity of numerals.
-- Gene Widhoff
To express e, remember to memorize a sentence to simplify this.
-- John L. Greene
I'm forming a mnemonic to remember a function in analysis.
-- Maxey Brooke
It repeats: A constant of calculus,
A constant of calculus.
-- Jeffrey Strehlow