$ \sqrt{98+\sqrt{1/5+\sqrt{6/25}}}=\sqrt{98+\sqrt{1/5+2/5}}=\sqrt{98+\sqrt{4}}=\sqrt{98+2}=\sqrt{100}=10 $:صورت کسر $ \sqrt{1+5\sqrt{7+7\sqrt{6\sqrt{36}}}}=\sqrt{1+5\sqrt{7+7\sqrt{6 \times6}}} = \sqrt{1+5\sqrt{7+7\times6}} = \sqrt{1+5\sqrt{49}} = \sqrt{1+5\times7 = \sqrt{1+35}} =\sqrt{36}=6 $:مخرج کسر $ S=\frac{10}{6} \Rightarrow \frac{1}{S} = \frac{6}{10}=0/6 $