(3y+12)/4=2-(5y-7)/2
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(3y+12)/4=2-(5y-7)/2
(3y+12)/4=2-(5y-7)/2
(3y+12)/4=2-(5y-7)/2
(3y+12)/4=2-(5y-7)/2 去分母
3y+12=2x4-2(5y-7)
3y+12=8-10y+14
13y=10
y=10/13
3y+12=8-10y+14
13y=10
y=10/13
答案6/13
2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1
[T,Y]=ode45(@rigid,[0 1],[rand(15,1)]);plot(T,Y(:,1),'-',T,Y(:,2),'-.',T,Y(:,3),'.',T,Y(:,4),'-',T,Y(:,5),'-.',T,Y(:,6),'.',T,Y(:,7),'-',T,Y(:,8),'-.',T,Y(:,9),'.',T,Y(:,10),'-',T,Y(:,11),'-.',T,Y(:,12),'-.',T,Y(:,13),'.',T,Y(:,14),'-',T,Y(:,15),'.')
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