（x-2.1823）/x=-1.08%
    （x-2.1823）/x=1.08%
    1.0948X+(1-X)0.92<0.98
    1.9048X+(1-X)0.92<0.98
    -（x-1）>3 2x+9>3
    -（x-1）>3 2x+9
    2x+1>-1 2x+1<3
    2x+1>-1
    8x/((x-6.35-(x/100))^3*(6.35+(x/100))*3.14) <1.99
    8x/((x-6.35-(x/100))^3*(6.35+(x/100))*3.14) <3.546
    8x/((x-6.35-(x/100))^3*(6.35+(x/100))*3.14) <2.6237
    8x/((x-6.35-x/100)^3*(6.35+x/100)*3.14) <2.6237
    8x/((x-6.35-x/100)^3*(6.35+x/100)*3.1415926) <2.6237
    8x/((x-6.35-x/100)^3*(6.35+x/100)*3.1415926) <3.546
    3.1415926*8x/((x-6.35-x/100)^3*(6.35+x/100)) <3.546
    8x/((x-6.35-x/100)^3*(6.35+x/100)) <3.546
    8x/((x-6.35-x/100)^3*(6.35+x/100))<2
    -3+6a-a^2+6≥0
    a^2-6a-3≤0
    x^2+x-2≤0

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