Răspuns :
[tex]125 {}^{x} = \frac{1}{5} [/tex]
[tex]5 {}^{3x} = \frac{1}{5} [/tex]
[tex]5 {}^{3x} = 5 {}^{ - 1} [/tex]
[tex]x = - \frac{1}{3} [/tex]
sau scris ca fractie zecimala
[tex]x = 0.(3)[/tex]
[tex]125 {}^{x} = \frac{1}{5} [/tex]
[tex]5 {}^{3x} = \frac{1}{5} [/tex]
[tex]5 {}^{3x} = 5 {}^{ - 1} [/tex]
[tex]x = - \frac{1}{3} [/tex]
sau scris ca fractie zecimala
[tex]x = 0.(3)[/tex]