0\; ,\; b>0)\; }\\\\\\3\leq a\leq 5\; \; ,\; \; \; 5\leq b\leq 6\; \; \Rightarrow \; \; \dfrac{1}{6}\leq \dfrac{1}{b}\leq \dfrac{1}{5}\\\\\\\dfrac{a}{b}=a\cdot \dfrac{1}{b}\\\\\\3\cdot \dfrac{1}{6}\leq \; a\cdot \dfrac{1}{b}\; \leq 5\cdot \dfrac{1}{5}\\\\\\\dfrac{1}{2}\leq \; \dfrac{a}{b}\; \leq 1" alt="\boxed {\; a0\; ,\; b>0)\; }\\\\\\3\leq a\leq 5\; \; ,\; \; \; 5\leq b\leq 6\; \; \Rightarrow \; \; \dfrac{1}{6}\leq \dfrac{1}{b}\leq \dfrac{1}{5}\\\\\\\dfrac{a}{b}=a\cdot \dfrac{1}{b}\\\\\\3\cdot \dfrac{1}{6}\leq \; a\cdot \dfrac{1}{b}\; \leq 5\cdot \dfrac{1}{5}\\\\\\\dfrac{1}{2}\leq \; \dfrac{a}{b}\; \leq 1" align="absmiddle" class="latex-formula">