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[单选题]
求解微分方程dy/dx=x+y+1的通解的Matlab命令为()。
A.y=dsolve(y '=x+y+1')
B.y=dsolve('Dy=x+y+1')
C.y=dsolve('Dy=x+y+1'; 'x')
D.y=dsolve('Y'=x+y+1', 'x')
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C、y=dsolve('Dy=x+y+1'; 'x')
解析:
解析:
clear all
y=dsolve('Dy=x+y+1','x')
运行结果如下:
A.y=dsolve(y '=x+y+1')
B.y=dsolve('Dy=x+y+1')
C.y=dsolve('Dy=x+y+1'; 'x')
D.y=dsolve('Y'=x+y+1', 'x')
C、y=dsolve('Dy=x+y+1'; 'x')
解析:
解析:
clear all
y=dsolve('Dy=x+y+1','x')
运行结果如下:
第3题
A.2,2,3,4
B.3,1,1,3
C.2,2,2,4
D.2,1,1,4
第5题
选择适当的方法求解下列微分方程:
(1)e2x+yy'=4x;
(2)2xydx+(1+x2)dy=0;
(3)xy2y'=x3+y3,x>0,y(1)=2;
(4)xy'-y+exy2=0,x>0,y(1)=e-1。
第10题