Exponentials and logarithms

A narrative-style introduction to exponentials and logarithms…
→ [preprint] ←  Keywords: #math #reals #exponentiation [Update history]

At least in most of the calculus texts I have seen, the natural logarithm is introduced in an ex cathedra fashion, as if somehow God descended from the Heavens above, and decreed that \(\log x := \int_1^x 1/t \, dt\)—and the exponential function, again by divine decree, is to be the inverse of \(\log\). The fact that I have no wish to usurp on His authority notwithstanding, here I provide another way to introduce both functions, starting with a concrete problem: how to compute the derivative of function \(a^x\). I hope it makes for an clear and enlightening read.

April 10, 2024. Got feedback? See the contact page.

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