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Answer :

Answer:

c

Step-by-step explanation:

[tex]\frac{1}{9^{2} }[/tex]=1/81

[tex]9^{\frac{1}{2} }[/tex] =3

[tex]\frac{1^{2} }{9}[/tex]=[tex]\frac{1}{9}[/tex]

[tex]9^{-2}[/tex]=1/81