##### $e$ to the $\ln x$

\[\begin{align*} \boxed{ e^{\ln x} = x } \end{align*}\] What is $e$? \( e \) is a special number in math, approximately equal to 2.718. It is also called Euler’s constant and is the base of a logarithm called the natural logarithm. You can think of it as the number that makes many things in math…

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