(x+2)<0
    x^2+x-2<0
    400/x=400/1.25x+1
    abs（2x+1）
    abs（2x+1）=1
    (4*x^2+4*x-4)^2-4*x^2*(4*x^2+4*x+1)>0
    (2x-1)(5-x)<0
    1÷2x-1≤-1
    1÷4-x≥-2
    12x^2-25x+12≤0
    -3x^2+2x-5≥0
    -3x^2+4x-1≤0
    4x^2-4x+1≤0
    abs(1-2x)≤5
    abs(2x-3)≥6
    -1≤1÷x≤1
    -1≤1≤
    -abs(4-3x)≤5
    -abs(3x-3)≥-7
    abs(4x-3)≤-2

Home page << page1193 page1194 page1195 page1196 page1197 ... ... page1208page page1209page page1210page page1211page page1212page >> Last page 1276 pages in total