50x+30(500-x)<20000
    -2a*sqrt(1+2/a)/a≥1
    2a*sqrt(1+2/a)/a≥1
    sqrt(4a^2*(1+2/a))/a≥1
    (2a*sqrt(1+2/a))/a≥1
    m≥4（150-m）
    1+t/0.001>0.8
    x/(0.357*26.131)<125
    (2m)^2-4(m+3)(m-2)>0
    40-2x<15
    -3x+sqrt3+sqrt3+sqrt3-1>sqrt3+sqrt3+sqrt3+sqrt3+sqrt3+sqrt3-10
    (442.5*0.000547135*5505.15*V^2+148976.475+411*0.000547135*5505.15^3*V^2/(599.6*V*5505.15)^2)/10000 <101.57
    (442.5*0.000547135*5505.15*V^2+148976.475+411*0.000547135*5505.15^3*V^2/(599.6*V5505.15)^2)/10000<101.58
    (442.5*0.000547135*6606.18 *V^2+148976.475+411*0.000547135*4404.12 ^3 *V^2/(599.6*V-6606.18)^2)/10000 <102.22
    (442.5*0.000547135*9909.27*V^2+148976.475+411*0.000547135*1101.03^3 *V^2/(599.6*V-9909.27)^2)/10000 <104.14
    (442.5*0.000547135*8808.24*V^2+148976.475+411*0.000547135*2202.06^3 *V^2/(599.6*V-8808.24)^2)/10000 <103.5
    （442.5*0.000547135*7707.21*V^2+148976.475+411*0.000547135*3303.09^3*V^2/(599.6V-7707.21)^2）/10000＜102.85
    （442.5*0.000547135*5505.15*V^2+148976.475+411*0.000547135*5505.15^3*V^2/(599.6V-5505.15)^2/10000＜101.57
     (442.5*0.000547135 * 4404.12* V ^ 2 + 148976.475 + 411 * 0.000547135 * 6606.18^3 * V^2/( 599.6 * V - 4404.12)^2)/10000 <100.93
    （442.5*0.000547135*3303.09*V^2+148976.475+411*0.000547135*7707.21^3*V^2/(599.6V-3303.09)^2）/10000＜100.29

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