---
title: "Fundamental Theorem of Calculus"
type: concept
source: https://www.jemoka.com/posts/kbhfundamental_theorem_of_calculus/
confidence: high
status: active
---

Lovely, well known result:
\begin{equation} \dv x \int_{a}^{x} f(t)\dd{t} = f(x) \end{equation}
for any fixed \(a\). This is because that&rsquo;s functionally using \(a\) as a \(+C\) term.
