Resposta :

Niiya
[tex]1 / (\sqrt{5}*\sqrt{2})=1/\sqrt{2*5}[/tex]
[tex]1/(\sqrt{5}*\sqrt{2})=(1/ \sqrt{10})*(\sqrt{10}/\sqrt{10})[/tex]
[tex]1/(\sqrt{5}*\sqrt{2})=\sqrt{10}/10[/tex]

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