(0.8x/264.09)^2.519+(0.81x/219.24)^2.011=1
    a^4+a^3+a^2+a+1=0
    0.2+(0.81x/113)+(x-0.1484)^2/370^2+(0.8x-0.170)^2/27^2 = 1
    0.2+(0.81x/105)+(x-0.1484)^2/504^2+(0.8x-0.170)^2/40^2 = 1
    0.2+(0.81x/133.56)+(x-0.1484)^2/401^2+(0.8x-0.170)^2/31^2=1
    0.2+(0.81x/133.56)+(x-0.1484)^2/401^2+(0.8x-0.170)^2/35^2=1
    0.2+(0.81x/133.56)+(x-0.1484)^2/401^2+(0.8x-0.170)^2/29.9^2=1
    x×x+x＝84
    37.6889=100/(1+x)^20
    90.7029 = 100/(1+x)^2
    90.7029 = 100/(1+x)^2
    90.7029=100/(1+x)^2
    95.2381=100/(1+x)^1
    1.6(1+ x)2=2.5
    90.70 = 100/(1+x)^3
    90.70=100/(1+x)^2
    90.70=100/(1+x)+100/(1+x)^2
    95.24=100/(1+x)
    90.70=100/（1+x）
    1728 ：2304=x ：8.5

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