5.3 The Fundamental Theorem of Calculus/35

Failed to parse (unknown function "\begin{align}"): {\displaystyle \begin{align} \int_{1}^{9}\frac{1}{2x}dx = \frac{1}{2}\int_{1}^{9}\frac{1}{x}dx &= \frac{1}{2}\ln{|x|}\bigg|_{1}^{9} = \frac{1}{2}\ln{|9|}-\frac{1}{2}\ln{|1|} &= \ln{|9^{\frac{1}{2}} \end {align} }