Respuesta :

[tex]\begin{gathered} r=\log _a2 \\ s=\log _a3 \\ t=\log _a5 \end{gathered}[/tex]

Therefore,

[tex]\begin{gathered} \log _a75=\log _a5+\log _a5+\log _a3 \\ \log _a75=t+t+s \\ \log _a75=2t+s \end{gathered}[/tex]