40a+30(50-a)>=1800
    0<(-0.2396-23.56*D)*(-0.495-46.61*D)<1
    89x+94x+93x+87-87x+95-95x+92-92x+87-87x≥87x+89x+91x+95-95x+94-94x+96-96x+89-89x
    16a+10（40-a）≤550
    x^2<-2
    x^2<2
    x^2>-1
    x^3>-1
    x<1+1
    1.7323*10^9<((6.35+0.01x)*(0.99x-6.35)^3)/x
    4(y-2)(3y+7)≥0
    x×x－x＋1≥0
    0<(1-l/-1.25)*(1-l/1.6)<1
    3+2x ≥ 1
    850m+700（11000-m）≤11000
    4x+10>x+1
    3x-3-2x≥-6
    x-3（x+1）＞-5
    3+3x+2-2x大于等于6
    4(x-1)大于3x-2

Home page << page509 page510 page511 page512 page513 ... ... page524page page525page page526page page527page page528page >> Last page 1275 pages in total