Question

Решите неравенство:
lg(4-8x)≥-1

Answer 1

lg(4-8x)≥-1;
lg(4-8x)≥lg0,1;
4-8x≥0,1;
-8x≥0,1-4;
-8x≥-3,9;
x≤39/80;
ОДЗ:
4-8x>0;
-8x>-4;
x<0,5.
Ответ: (-∞; 39/80]