x/e^0.01x=0
    147.88/(1+0.61e^(-0.05x) )=120
    147.7276/(1+0.4277e^(-0.0582x) )=125
    134.78/(1+0.55e^(-0.09x) )=125
    126.6488/(1+0.4014e^(-0.0872x) )=125
    x/e^x=0.2
    x=2
    X乘以X减24X加72等于0
    12*x^6+10*x^4-6*x^2-6=0
    X２减24X加72等于0
    (4+x)x=718
    (4+x)x
    x/(e^(x))=0.2
    x/(e^(x))=100
    x/(e^(x))=1
    (-x-1)²
    x²+x＝600
    √9.8/x＝2π
    58.5*sqrt(x)*40+111*x = 8000
    58.5*sqrt(x)*30+111*x = 8000

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