Answer: the first one
[tex]\frac{\sqrt[4]{9}.\sqrt{9} }{\sqrt[4]{9^{5} } }\\\\=\frac{\sqrt[4]{9}.3 }{\sqrt[4]{9^{4}.\sqrt[4]{9} } }\\\\=\frac{3 }{\sqrt[4]{9^{4} } }=\frac{3}{9}=\frac{1}{3}=9^{-\frac{1}{2} }[/tex]
Step-by-step explanation:
