[tex]\it a=\dfrac{2}{\not3}\cdot\dfrac{\not3}{\not4}\cdot\dfrac{\not4}{\not5}\cdot\dfrac{\not5}{\not6}\cdot\dfrac{\not6}{\not7}\cdot\dfrac{\not7}{8}=\dfrac{\ \ 2^{(2}}{8}=\dfrac{1}{4}\\ \\ \\ b=\dfrac{3}{\not4}\cdot\dfrac{\not4}{\not5}\cdot\dfrac{\not5}{\not6}\cdot\dfrac{\not6}{\not7}\cdot\dfrac{\not7}{\not8}\cdot\dfrac{\not8}{9}=\dfrac{\ \ 3^{(3}}{9}=\dfrac{1}{3}[/tex]
[tex]\it 4 > 3 \Rightarrow \dfrac{1}{4} < \dfrac{1}{3} \Rightarrow a < b[/tex]
