View source for E^(-x) less than 1-(x/2) for 0 less than x less than or equal to 1.5936

==Theorem==
The following formula holds for $0 < x \leq 1.5936$:
$$e^{-x} < 1 - \dfrac{x}{2},$$
where $e^{-x}$ denotes the [[exponential]].

==Proof==

==References==
* {{BookReference|Handbook of mathematical functions|1964|Milton Abramowitz|author2=Irene A. Stegun|prev=E^x greater than (1+x/y)^y greater than exp(xy/(x+y) for x greater than 0 and y greater than 0)|next=abs(z)/4 less than abs(e^z-1) less than (7abs(z))/4 for 0 less than abs(z) less than 1}}: $4.2.37$

[[Category:Theorem]]
[[Category:Unproven]]