2/3*((1-1/0.02)+(3/4+1/0.02)*(1/3*220/x*0.35805183739485175)^0.02)=6.794/x
    2/3*((1-1/0.005)+(3/4+1/0.005)*(1/3*220/x*0.35805183739485175)^0.005)=6.794/x
    1394.17+410.05X-780.44-688.63X-81.78X^2*(317.17+28.73X)/(241.31+28.73X)=0
    2/3*((1-1/0.005)+(3/4+1/0.005)*(1/3*220/x*0.35805183739485175)^0.005)=7.3186/x
    2/3*((1-1/0.015)+(3/4+1/0.015)*(1/3*220/x*0.35805183739485175)^0.015)=7.3186/x
    2/3*((1-1/0.02)+(3/4+1/0.02)*(1/3*220/x*0.35805183739485175)^0.02)=7.3186/x
    2/3*((1-1/0.02)+(3/4+1/0.02)*(1/3*220/x*0.35805183739485175)^0.02)=7.11/x
    2/3*((1-1/0.005)+(3/4+1/0.005)*(1/3*220/x*0.35805183739485175)^0.005)=7.11/x
    2/3*((1-1/0.015)+(3/4+1/0.015)*(1/3*220/x*0.35805183739485175)^0.015)=7.11/x
    x－1/x－2
    -lnx=x^2e^x
    lnx=1
    x3-4x2-3＝0
    （1-5/8）x=15/14
    （1-1/2）x=1/5
    2x÷（4/1）=（2/1）
    4x÷（5/6）=（5/9）
    (X^2*ln(0.66*2.72/4.07/X))/((1-X)^2)*ln(0.34*2.72/4.4/(1-X)) = 1
    (X^2*ln(0.66*2.72/4.07/X))/((1-X)^2)*ln(0.34*2.72/4.3/(1-X)) = 1
    (X^2*ln(0.66*2.72/4.07/X))/((1-X)^2)*ln(0.34*2.72/4.5/(1-X)) = 1

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