matlab,解微分方程,[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');k=simple(k)y=simple(y)[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');|Error:Missing variable or function.
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![matlab,解微分方程,[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');k=simple(k)y=simple(y)[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');|Error:Missing variable or function.](/uploads/image/z/14876013-21-3.jpg?t=matlab%2C%E8%A7%A3%E5%BE%AE%E5%88%86%E6%96%B9%E7%A8%8B%2C%5Bk%2Cy%5D%3Ddsolve%28%27Dy%3Dk%2A%28y-28%29%27%2C%27Dk%3D0%27%2C%27y%280%29%3D30.8%27%2C%27y%2860%29%3D29.1%27%2C%27t%27%29%EF%BC%9Bk%3Dsimple%28k%29y%3Dsimple%28y%29%5Bk%2Cy%5D%3Ddsolve%28%27Dy%3Dk%2A%28y-28%29%27%2C%27Dk%3D0%27%2C%27y%280%29%3D30.8%27%2C%27y%2860%29%3D29.1%27%2C%27t%27%29%EF%BC%9B%7CError%3AMissing+variable+or+function.)
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matlab,解微分方程,[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');k=simple(k)y=simple(y)[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');|Error:Missing variable or function.
matlab,解微分方程,
[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');
k=simple(k)
y=simple(y)
[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');
|
Error:Missing variable or function.
matlab,解微分方程,[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');k=simple(k)y=simple(y)[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');|Error:Missing variable or function.
我刚试了,在我的电脑上是可以解的,没有任何问题的!
k =
log(11/28)/60
y =
(14*(11/28)^(t/60))/5 + 28
请帮忙用Matlab求解微分方程dy/dt=[k^(t-1)*y-d]y并且怎样用图像表示呢?谢谢啊!
matlab,解微分方程,[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');k=simple(k)y=simple(y)[k,y]=dsolve('Dy=k*(y-28)','Dk=0','y(0)=30.8','y(60)=29.1','t');|Error:Missing variable or function.
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