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syms T t i
N=8;
T=zeros(1,N);
q(1)=3/100*(t/100)^2;
cmin=inf;
for T(1)=1000:-5:200;                  %¸Ä±äT£¨1£©µÄ³õÖµ
for i=2:8                             %¸Ä±äi£¬»ñµÃµ½ÆäËûµÄqÖµºÍTÖµ
    q(i)=1.1.^(i-1).*3./100.*((t+symsum(T(i),i,1,i-1))/100)^2;
    R=int(q(1),t,0,T(1));
    digits(2)
    z=vpa(solve(int(q(i),t,0,T(i))-R,T(i)));      %»ñµÃT(i)µÄÖµ
    T(i)=z(find(imag(z)==0))                      %ɸѡ£¬È¡T(i)µÄÕýʵÊý½â
end
  C=(31000+500*8*R)/(symsum(T(i),i,1,8)+40);       %Ä¿±êº¯Êý
  if cmin>C
      cmin=C;                                      %½«CµÄ½ÏСֵ¸³Öµ¸øcmin     
      Tmin=T(1);                                   %½«C½ÏСʱµÄT(1)¸³Öµ¸øTmin  
  end
end
cmin
Tmin
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