求解initial value problem y =-y/x y(1)=1?
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2017-02-20 7:30 am
✔ 最佳答案
求解initial value problem y’=－y/x，y(1)=1?Sol
y’=－y/x
dy/dx=－y/x
xdy=－ydx
－dy/y=dx/x
－lny=lnc+c1
e^(－lny)=e^(lnx+c1)
1/y=c2*x
xy=c3
1=c3
y(1)=1
xy=1
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