作业帮(11-y-1/7y)x40%+36%y+1/7yx35%=11x38.5% (x为乘号,y为未知数）y＝?
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(11-y-1/7y)x40%+36%y+1/7yx35%=11x38.5% (x为乘号,y为未知数）y＝?
(11-y-1/7y)x40%+36%y+1/7yx35%=11x38.5% (x为乘号,y为未知数）
y＝?
(11-y-1/7y)x40%+36%y+1/7yx35%=11x38.5% (x为乘号,y为未知数）y＝?
★★★ 1/7y是(1/7)y还是1/(7y)；电脑打出来的这种形式请多加一个括号.
(11-y-1/7y)x40%+36%y+1/7yx35%=11x38.5%
(11-y-1/7y)x40%+36%y+1/7yx35%=11x38.5%
(11-8/7y)*40%+36%y+1/7y*35%=11*38.5%
(11-8/7y)*40+36y+1/7y*35=11*38.5
(11-8/7y)*8+7.2y+1/7y*7=11*7.7
88-64/7y+7.2y+y=84.7
3.3=64/7y-8.2y
3.3=(64-57.4)y/7
3.3=6.6y/7
1=2y/7
y=7/2
y=3.5
(11-y-1/7y)x40%+36%y+1/7yx35%=11x38.5% (x为乘号,y为未知数）y＝?
-y - y/1-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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[(y*y*y-y)/(xy+1)*(xy+1)-(x+y)*(x+y)]/[(x+y)*y/(x+1)]其中x=-11,y=1/12,化简再求值.
2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1