Simplify \[{{\left( 5a{{n}^{-2}} \right)}^{-1}}\]

1.	Simplify \[{{\left( 5a{{n}^{-2}} \right)}^{-1}}\]
A.	\[\frac{{{n}^{2}}}{5a}\]
B.	\[\frac{n}{5a}\]
C.	\[\frac{{{n}^{3}}}{5a}\]
D.	\[\frac{{{n}^{4}}}{5a}\]
Answer» B. \[\frac{n}{5a}\]

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Simplify \[{{\left( 5a{{n}^{-2}} \right)}^{-1}}\]

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