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Yasemine1
a fost răspuns

Calculati log in baza x din 1\81=4

Răspuns :

Kobolan
[tex]log_{x} \frac{1}{81} = 4 [/tex] ⇒ [tex] x^{4} = \frac{1}{81} [/tex] ⇒ [tex]x = \pm \frac{1}{3}[/tex]
[tex] log_{x} \frac{1}{81} =4 [/tex]
 [tex]x^{4}= \frac{1}{81} [/tex]
[tex]x= +-\sqrt[4]{ \frac{1}{81} } [/tex]
[tex]x= +-\sqrt[4]{3^{-4} } [/tex]
[tex]x=+-3^{\frac{-4}{4}}[/tex]
[tex]x=+-3^{-1}[/tex]
[tex]x= +-\frac{1}{3} [/tex]


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