60.35^2*680/3.4*(9.2-2*x)/(9.2-x)+1.0*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9.2-x)*43.85^2/60.35^2)/(75*450/3.4*9.2/(9.2-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9.2-x)^2/60.35^4) = 0
    60.35^2*670/3.4*(9.2-2*x)/(9.2-x)+1.0*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9.2-x)*43.85^2/60.35^2)/(75*450/3.4*9.2/(9.2-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9.2-x)^2/60.35^4) = 0
    60.35*60.35*680/3.4*(9.2-2*x)/(9.2-x)+1.0*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9.2-x)*43.85^2/60.35^2)/(75*450/3.4*9.2/(9.2-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9.2-x)^2/60.35^4) = 0
    60.35*60.35*700/3.4*(9.2-2*x)/(9.2-x)+1.0*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9.2-x)*43.85^2/60.35^2)/(75*450/3.4*9.2/(9.2-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9.2-x)^2/60.35^4) = 0
    60.35*60.35*600/3.4*(9.2-2*x)/(9.2-x)+1.0*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9.2-x)*43.85^2/60.35^2)/(75*450/3.4*9.2/(9.2-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9.2-x)^2/60.35^4) = 0
    60.35*60.35*450/3.4*(9.2-2*x)/(9.2-x)+1.0*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9.2-x)*43.85^2/60.35^2)/(75*450/3.4*9.2/(9.2-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9.2-x)^2/60.35^4) = 0
    60.35*60.35*550/3.4*(9.5-2*x)/(9.5-x)+1.0*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9.5-x)*43.85^2/60.35^2)/(75*450/3.4*9.5/(9.5-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9.5-x)^2/60.35^4) = 0
    60.35*60.35*550/3.4*(9.2-2*x)/(9.2-x)+1.0*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9.2-x)*43.85^2/60.35^2)/(75*450/3.4*9.2/(9.2-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9.2-x)^2/60.35^4) = 0
    176=5/2x^2-3x
    -1/2（x-0.2)^2+1.62=0
    5x^3-12x-8＝0
    5x3-12x-8＝0
    6（17.2-x）=265（x+11.6）
    60.35*60.35*550/3.4*(9-2*x)/(9-x)+1.2*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9-x)*43.85^2/60.35^2)/(75*450/3.4*9/(9-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9-x)^2/60.35^4) = 0
    60.35*60.35*550/3.4*(9-2*x)/(9-x)+1.0*36*(165*2*3.14*25^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9-x)*43.85^2/60.35^2)/(75*450/3.4*9/(9-x)/60.35^2+71*165*2*3.14*25^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9-x)^2/60.35^4) = 0
    60.35*60.35*550/3.4*(9-2*x)/(9-x)+1.0*36*(165*2*3.14*30^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9-x)*43.85^2/60.35^2)/(75*450/3.4*9/(9-x)/60.35^2+71*165*2*3.14*30^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9-x)^2/60.35^4) = 0
    60.35*60.35*500/3.4*(9-2*x)/(9-x)+1.0*36*(165*2*3.14*30^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25^2/3.4*(9-x)*43.85^2/60.35^2)/(75*450/3.4*9/(9-x)/60.35^2+71*165*2*3.14*30^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9-x)^2/60.35^4) = 0
    60.35*60.35*400/3.4*(9-2*x)/(9-x)+1.2*36*(165*2*3.14*30^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25*20/3.4*(9-x)*43.85^2/60.35^2)/(75*450/3.4*9/(9-x)/60.35^2+71*165*2*3.14*30^2/3.4*x^2/43.85^4+71*2*3.14*20^2/3.4*(9-x)^2/60.35^4) = 0
    60.35*60.35*450/3.4*(9-2*x)/(9-x)+1.2*36*(165*2*3.14*30^2/3.4*x*60.35^2/43.85^2+165*2*3.14*25*25/3.4*(9-x)*43.85^2/60.35^2)/(75*450/3.4*9/(9-x)/60.35^2+71*165*2*3.14*30^2/3.4*x^2/43.85^4+71*2*3.14*25^2/3.4*(9-x)^2/60.35^4) = 0
    60.35*60.35*450/3.4*(9-2*x)/(9-x)+1.2*36*(165*2*3.14*30^2/3.4*x*60.35^2/43.85^2+165*2*3.14*20*20/3.4*(9-x)*43.85^2/60.35^2)/(75*450/3.4*9/(9-x)/60.35^2+71*165*2*3.14*30^2/3.4*x^2/43.85^4+71*2*3.14*20^2/3.4*(9-x)^2/60.35^4) = 0

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