0.9=e^5×k
    37=47e^k
    （2253.34-x-6139.93）/6139.93=(2613.09+x-3716.13)/3716.13
    2*8x=8
    X-X/1.13×0.13=23722627.74
    X-X/1.13×0.13=23674242.42
    X-X/1.13×0.13=23622047.24
    X-X/1.13×0.13=23565573.77
    X-X/1.13×0.13=23504273.5
    X-X/1.13×0.13=23437500
    ㏒(2,x)=2^-x
    ㏒(10,x)=1/x
    2x^3-4x^2-3x+1=0
    X-X／1.13×0.13=21367521.37
    X-X／1.13×0.13=22321428.57
    X-X／1.13×0.13=23364485.98
    x（x-9）+2=0
    ㏒(0.8,0.2）=x
    ㏒(0.8,0.6）=x
    1/2^x/5730=62.76%

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