Answer:
[tex]9^{-5}[/tex]
Step-by-step explanation:
By using indices rule, [tex]\frac{x^{m} }{x^{n} }= x^{m-n}[/tex]
[tex]\frac{9^2}{9^7}= 9^{2-7} = 9^{-5}[/tex]
[tex] = {9}^{2} : {9}^{7} \\ = 81:4782969 \\ = 1:59049[/tex]
