1) (x² -x -2)/x ≥ 0;
(x+1)(x-2)/x ≥0 ;
- + - +
------------- -1 --------- 0 ----------- 2 -------------
x ∈[ -1; 0) U [2;∞)
2) (x² -3)/(x² -1)≥ 1;
(x² -3)/(x² -1)-1 ≥0 ;
(x² -3-x² +1)/(x² -1)≥ 0 ;
-2/(x² -1)≥0
x² -1 <0 ;<br>(x+1)(x-1) <0 ;<br>x∈(-1;1) .