（800-2x）（600-2x）≥240000
    （800-2Xx）（600-2x）≥240000
    x^2+4x≥0
    x^2+8x-4≥0
    2x^2 + 5x - 3 > 0
    3(x-1)≤5x＋1
    x／4-3／20＜x／5
    2x + 5 > 11
    4-4×（K-1）×3≥0
    80-2x+20≥50
    －3＜－m－1＜1
    12x^2 + 30x + 12 < 0
    (-0.25^(x-1))+3*(0.5^(x-1))-3*(0.75^(x-1))>0.9
    (-0.25^(x-1))+3*(0.5^(x-1))-3*(0.75^(x-1))>0.8
    (-0.25^(x-1))+3*(0.5^(x-1))-3*(0.75^(x-1))＜0.5
    (-0.25^(x-1))+3*(0.5^(x-1))-3*(0.75^(x-1))>0.5
    (-0.25^(x-1))+3*(0.5^(x-1))-3*(0.75^(x-1))>0.5
    -0.25^(x-1)+3*0.5^(x-1)-3*0.75^(x-1)>0.5
    -0.25^(x-1)+3*0.5^(x-1)-3*0.75^(x-1)>0.6
    m^2>5/3

Home page << page16 page17 page18 page19 page20 ... ... page31page page32page page33page page34page page35page >> Last page 1275 pages in total