作业帮2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1
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2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1
2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1
2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1
2(y-4)(3y+2)-5(-3y+7)(y+1)
=2(-5)(-1)-5(10)0
=10
2(y-4)(3y+2)-5(-3y+7)(y+1)
=(2y-8)(3y+2)-(-15y+35)(y+1)
=(6y²-20y-16)-(-15y²+20y+35)
=6y²-20y-16+15y²-20y-35
=21y²-51
=21-51
=-30
2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1
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[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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