Logarytmy
[tex] log \frac{1}{6} x > 2[/tex]
[tex] log \frac{ \sqrt{15} }{4} 5 \times log \frac{4}{ \sqrt{15} } x > 0[/tex]
[tex]log \frac{1}{9} (x ^{2} - 6x + 9) \leqslant 2 log1.9 \times 2[/tex]
[tex] log \frac{1}{19} (x ^{2} - 4) < log \frac{1}{19} (x + 8)[/tex]
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