matlab解微分方程组,syms S1 S2 t;[S2,S1]=dsolve('DS2=12.19t-24209-0.3*S2-0.01*S2','DS1=0.3*S2-0.01*S1','S1(2007)=1.1','S2(2000)=9.56');为什么运行不了,
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![matlab解微分方程组,syms S1 S2 t;[S2,S1]=dsolve('DS2=12.19t-24209-0.3*S2-0.01*S2','DS1=0.3*S2-0.01*S1','S1(2007)=1.1','S2(2000)=9.56');为什么运行不了,](/uploads/image/z/3687670-46-0.jpg?t=matlab%E8%A7%A3%E5%BE%AE%E5%88%86%E6%96%B9%E7%A8%8B%E7%BB%84%2Csyms+S1+S2+t%3B%5BS2%2CS1%5D%3Ddsolve%28%26%2339%3BDS2%3D12.19t-24209-0.3%2AS2-0.01%2AS2%26%2339%3B%2C%26%2339%3BDS1%3D0.3%2AS2-0.01%2AS1%26%2339%3B%2C%26%2339%3BS1%282007%29%3D1.1%26%2339%3B%2C%26%2339%3BS2%282000%29%3D9.56%26%2339%3B%29%3B%E4%B8%BA%E4%BB%80%E4%B9%88%E8%BF%90%E8%A1%8C%E4%B8%8D%E4%BA%86%2C)
matlab解微分方程组,syms S1 S2 t;[S2,S1]=dsolve('DS2=12.19t-24209-0.3*S2-0.01*S2','DS1=0.3*S2-0.01*S1','S1(2007)=1.1','S2(2000)=9.56');为什么运行不了,
matlab解微分方程组,
syms S1 S2 t;
[S2,S1]=dsolve('DS2=12.19t-24209-0.3*S2-0.01*S2','DS1=0.3*S2-0.01*S1','S1(2007)=1.1','S2(2000)=9.56');
为什么运行不了,
matlab解微分方程组,syms S1 S2 t;[S2,S1]=dsolve('DS2=12.19t-24209-0.3*S2-0.01*S2','DS1=0.3*S2-0.01*S1','S1(2007)=1.1','S2(2000)=9.56');为什么运行不了,
注意,12.19t这种写法不对,应该写成12.19*t.结果如下
>> syms S1 S2 t
>> [S2,S1]=dsolve('DS2=12.19*t-24209-0.3*S2-0.01*S2','DS1=0.3*S2-0.01*S1','S1(2007)=1.1','S2(2000)=9.56')
S2 =
((9975321*exp(620))/24025 + exp((3*t)/10)*((exp(179/10)*(4659318355*exp(217/100) - 19950642))/48050 + exp(t/100)*(1219*t - 2542800)) - (exp((31*t)/100)*(37789*t - 75169800))/961)/exp((31*t)/100)
S1 =
-((9975321*exp(620))/24025 - (exp((31*t)/100)*(37789*t - 75169800))/961)/exp((31*t)/100)