求解答
想得到当c从0到1,时E的解
>> syms k u c E;
>> c=0.2;
>> eq1=c/(1+((k + 2*u)/(2*k + 2*u))*(750/(13*u)-1))+(1-c)/(1+((k + 2*u)/(2*k + 2*u))*(25/(2*u)-1))-1;
>> eq2=c/(1+(k/(k+u))*(750/(7*k)-1))+(1-c)/(1+(k/(k+u))*(75/(4*k)-1))-1;
[k,u]=vpasolve(eq1,eq2,[k,u],[18.75 107.14;12.5 57.7]);
[E]=(4*k*u)/(k+u)