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yongjingji

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syms  B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 k67 k68
[b1 b2 b4 b5 b6 b7 b8 b10 b11 b12 b13]=solve('B3=b4*B4','b1*B1=b2*B2','b6*B6=b10*B10','b7*B7=b11*B11','b8*B8=b12*B12',...
    'b4*B4+b2*B2+b11*B11=b5*B5','b10*B10=b1*B1+b13*B13','b1=b13','b5*B5=b6*B6+b7*B7+b8*B8',...
    'b6=k67*b7','b6=k68*b8','b1','b2','b4','b5','b6','b7','b8','b10',...
'b11','b12','b13')


ÆäÖкÜÃ÷ÏÔb4=B3/B4£¬µ«Æä½á¹ûΪb4 =(B3*(B1*B7*k68 + B13*B7*k68))/(B11*k67*(B1*B8 + B13*B8 + B13*B6*k68))£¬
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