(x^2)*ln(0.6*7.65/47.97/x)/((1-x)^2)/ln(0.4*7.65/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.69/47.97/x)/((1-x)^2)/ln(0.4*7.69/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.9/47.97/x)/((1-x)^2)/ln(0.4*7.9/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.8/47.97/x)/((1-x)^2)/ln(0.4*7.8/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.6/47.97/x)/((1-x)^2)/ln(0.4*7.6/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.2/47.97/x)/((1-x)^2)/ln(0.4*7.2/4.074/（1-x）)=1
    (x^2)*ln(0.6*7/47.97/x)/((1-x)^2)/ln(0.4*7/4.074/（1-x）)=1
    (x^2)*ln(0.6*6.7/47.97/x)/((1-x)^2)/ln(0.4*6.7/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.7/47.97/x)/((1-x)^2)/ln(0.4*7.7/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.79/47.97/x)/((1-x)^2)/ln(0.4*7.79/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.797/47.97/x)/((1-x)^2)/ln(0.4*7.797/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.797/47.97/x)/((1-x)^2)/ln(0.4*6.797/4.074/（1-x）)=1
    (x^2)*ln(0.6*6.798/47.97/x)/((1-x)^2)/ln(0.4*6.798/4.074/（1-x）)=1
    (x^2)*ln(0.6*7.798/47.97/x)/((1-x)^2)/ln(0.4*7.798/4.074/（1-x）)=1
    (x^2)*ln(0.8*11.48/47.97/x)/((1-x)^2)/ln(0.2*11.48/4.074/（1-x）)=1
    (x^2)*ln(0.8*3.342/4.074/x)/((1-x)^2)/ln(0.2*3.342/47.97/（1-x）)=1
    2x2-3x-1
    [（2a/2）^2/(0.5-0.5a）^2
    [（2a/2）*（2a/2）]/(0.5-0.5a）*（0.5-0.5a）
    (x^2)*ln(0.6*1.897/4.074/x)/((1-x)^2)/ln(0.4*1.897/47.97/(1-x))

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