make pdf file generation work

quarto/integrals/mean_value_theorem.qmd

@@ -88,14 +88,14 @@ Though not continuous, $f(x)$ is integrable as it contains only jumps. The integ
 What is the average value of the function $e^{-x}$ between $0$ and $\log(2)$?
 
 
-$$
+
 \begin{align*}
 \text{average} = \frac{1}{\log(2) - 0} \int_0^{\log(2)} e^{-x} dx\\
 &= \frac{1}{\log(2)} (-e^{-x}) \big|_0^{\log(2)}\\
 &= -\frac{1}{\log(2)} (\frac{1}{2} - 1)\\
 &= \frac{1}{2\log(2)}.
 \end{align*}
-$$
+
 
 Visualizing, we have