[tex]log_{6125}\sqrt{7}\\=\frac{1}{2}.log_{6125}7\\=\frac{1}{2}.\frac{1}{log_76125}\\=\frac{1}{2(log_75^3+log_77^2)}\\=\frac{1}{6log_75+4}\\=\frac{1}{6.\frac{log5}{log7}+4}\\=\frac{1}{6.\frac{log5+log2-log2}{log7}+4}\\=\frac{1}{6.\frac{log10-log2}{log7}+4}\\=\frac{1}{6.\frac{1-m}{n}+4}\\=\frac{n}{4n-6m+6}[/tex]