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Sagot :
[tex]log_3( \frac{1}{9} )= \frac{x}{9} \\\\log_33^{-2}= \frac{x}{9} \\\\-2=\frac{x}{9} \ /\cdot9\\\\-18=x\\\\x=-18[/tex]
[tex]log_3(\frac{1}{9})=\frac{x}{9}\\
\\
log_33^{-2}=\frac{x}{9}\\
\\
3^{\frac{x}{9}}=3^{-2}\\
\\
\frac{x}{9}=-2\\
\\
\boxed{x=-18}[/tex]
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