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x=0.05*ln(1e-6*y+50000)+0.001y
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x=linspace(-1,1,100);
i=1;
re=[];
while i<=n
    t=solve([num2str(-x(i)),'+0.05*log(1e-6*y+50000)+0.001*y']) ;
    re=[re,t];   
    i=i+1;
end
re

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