X^2>25
x^-25>0
(x-5)(x+5)>0
(-∞; -5)U(5;+∞)
|x|≥5
x≥5 и x≤-5
(-∞; -5]U[5;+∞)
1/x≥1/2
1/x-1/2≥0
(2-x)2x≥0
2x(x-2)≤0
(0;2]
(x+1)/(5-x)≤0
(x+1)/(x-5)≥0
(-∞;-1]U(5;+∞)
|x| <7<br>x <7 и x >-7
(-7;7)
(x^2+x)/(2-x-x^2)≤0
x(x+1)/(x^2+x-2)≥0
x(x+1)/(x-1)(x+2)≥0
(-∞; -2)U[-1;0]U(1;+∞)