👤

Determinati nr x(7la puterea x)la puterea 9=7la puterea81

Răspuns :

[tex] (7^{x})^{9} = 7^{81} [/tex]
[tex] 7^{9x} = 7^{81} [/tex]
[tex]9x=81[/tex]
[tex]x=9[/tex]