Question

Which is the value of the expression

Answer 1

`~\hspace{7em}\textit{negative exponents} \\\\ a^(-n) \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^(-n)} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^(-m)\implies a^(n-m) \\\\[-0.35em] ~\dotfill\\\\ \left( \cfrac{1}{3^2} \right)^(-1)\implies \left( \cfrac{3^2}{1} \right)^(+1)\implies 3^2\implies 9`