Răspuns:
[tex] { \sqrt{5} }^{ - 1} = \frac{1}{ \sqrt{5} } = \frac{ \sqrt{5} }{5} [/tex]
[tex](\sqrt{5})^{-1}=\frac{1}{\sqrt{5}}=\frac{\sqrt{5}}{5}.[/tex]
@robertinnifd
