7600/（x+99*0.12+99*0.12)+6700/(x+99*0.12)+10000/(x+99*0.12)=150
    7600/（x+99*0.12)+6700/(x+99*0.12)+10000/(x+99*0.12)=150
    7600/（x+23.76)+6700/(x+11.88)+10000/(x+11.88)=150
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=1.214
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=1.201
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=1.218
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.1024
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.09513
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.1055
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.1562
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.1898
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.171
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.08258
     68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.08132
    68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.07572
     68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.07522
     68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.06024
     68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=0.1016
     68.3687 + ( (0.0828135 - 68.3687) / (( 1 + (x/44371.4)^0.981905))^10 )=1.211
     (50*707 /r/(600-r) -1)(50* 707 /r/(600-r) -1)=1/r

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