Lg³x² =8lgx
2lg³x =8lgx
lg³x - 4lgx = 0
lgx · (lg²x - 4) = 0
lgx · (lgx - 2) (lgx + 2) = 0
1) lgx = 0 → x = 1
2) lgx - 2 = 0 → lgx = 2 → x = 100
3) lgx + 2 = 0 → lgx = -2 → x = 0.01
Ответ: 0,01; 1; 100
0(.27)=27/99 ... ......тоже самое впринципе
X×6(x)/1 ×1/6x =-1
6x(x)/1×1/6x(1) =-1
X/1×1/1 =-1 перемножим
X/1=-1
X=-1