Cho a > 0 , khác 1 ; x,y là các số thực dương. Mệnh đề nào sau đây đúng
A.\({{\log }_{a}}\frac{x}{{{y}^{2}}}=\frac{{{\log }_{a}}x}{2{{\log }_{a}}y}\)
B. \({{\log }_{a}}\frac{x}{{{y}^{2}}}={{\log }_{a}}x-\frac{1}{2}{{\log }_{a}}y\)
C.\({{\log }_{a}}\frac{x}{{{y}^{2}}}=\frac{1}{2}\left( {{\log }_{a}}x-{{\log }_{a}}y \right)\)
D. \({{\log }_{a}}\frac{x}{{{y}^{2}}}={{\log }_{a}}x-2{{\log }_{a}}y\)
A.\({{\log }_{a}}\frac{x}{{{y}^{2}}}=\frac{{{\log }_{a}}x}{2{{\log }_{a}}y}\)
B. \({{\log }_{a}}\frac{x}{{{y}^{2}}}={{\log }_{a}}x-\frac{1}{2}{{\log }_{a}}y\)
C.\({{\log }_{a}}\frac{x}{{{y}^{2}}}=\frac{1}{2}\left( {{\log }_{a}}x-{{\log }_{a}}y \right)\)
D. \({{\log }_{a}}\frac{x}{{{y}^{2}}}={{\log }_{a}}x-2{{\log }_{a}}y\)
Loga
Hóa Học lớp 12
