4.
2) ОДЗ: 2x+3>0
2x>-3
x> -1.5
2x+3≤ (1/5)⁻³
2x+3≤5³
2x≤125-3
2x≤122
x≤61
{x> -1.5
{x≤61
x∈(-1.5; 61]
3) ОДЗ: x≠ -2
(11x²-x)(2+x)≤0
11x(x- ¹/₁₁)(x+2)≤0
x(x - ¹/₁₁)(x+2)≤0
x=0 x=¹/₁₁ x= -2
- + - +
-------- -2 ------------- 0 ------------- ¹/₁₁ ------------
\\\\\\\\\\ \\\\\\\\\\\\\\\\
x∈(-∞; -2)U[0; ¹/₁₁]