4х-1 ≥ 1
3х+1
4х-1 - 1 ≥0
3х+1
4х-1 - (3х+1) ≥0
3х+1
4х-1-3х-1 ≥0
3х+1
х-2 ≥0
3х+1
{3x+1≠0
{(x-2)(3x+1)≥0
3x+1≠0
3x≠-1
x≠-1/3
(x-2)(3x+1)≥0
1/3 (x-2)(x+ ¹/₃) ≥0
(x-2)(x+¹/₃) ≥0
x=2 x=- ¹/₃
+ - +
--------- -¹/₃ ----------- 2 ------------
\\\\\\\\\ \\\\\\\\\\\\\\\
x∈(-∞; -¹/₃)U[2; +∞)
Ответ: 2)