1728 ×2304=x ×8.5 x=
    0.198+(0.81x/123.5)+(x-0.1478)^2/545.88^2+(0.8x-0.168)^2/39.9^2=1
    x^3-1
    0.2+(0.81x/123)+(x-0.147)^2/550^2+（0.8x-0.168)^2/39^2=1
    0.2+(0.81x/187)+(x-0.147)^2/550^2+（0.8x-0.168)/155=1
    0.2+(0.81x/187)+(x-0.147)^2/550^2+（0.8x-0.168)/67=1
    0.2+(0.81x/123)+(x-0.147)^2/550^2+（0.8x-0.168)/67=1
    0.2+(0.81x/123)+(x-0.147)^2/550^2+（0.8x-0.168)/39=1
    0.2+(0.81x/123)+(x-0.147)^2/700^2+（0.8x-0.168)/39=1
    0.2+(0.81x/123)+(x-0.147)^2/400^2+（0.8x-0.168)/39=1
    0.2+(0.81x/123)+(x-0.147)^2/200^2+（0.8x-0.168)/39=1
    0.2+(0.81x/123)+(x-0.147)^2/545^2+（0.8x-0.168)/39=1
    0.74+(0.81x/123)+(x-0.147)^2/545^2+（0.8x-0.168)/39=1
    X/（1-X）=10%
    12=13（32％-x%）/x
    13*（32%-x％）=12x
    -x^3+x^2+3x-2=0
    185.002x+1.13215
    x+10%x＝40000
    b^2-2lnb+2 = e3

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