1,7Y+6=-6Y 2.2Y-3=7Y=7 3.0.5X-0.7=6.1-1.2X 4.1-3/2X+3X+5/2
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1,7Y+6=-6Y2.2Y-3=7Y=73.0.5X-0.7=6.1-1.2X4.1-3/2X+3X+5/21,7Y+6=-6Y2.2Y-3=7Y=73.0.5X-0.7=6.1-1.2X4.1-3
1,7Y+6=-6Y 2.2Y-3=7Y=7 3.0.5X-0.7=6.1-1.2X 4.1-3/2X+3X+5/2
1,7Y+6=-6Y 2.2Y-3=7Y=7 3.0.5X-0.7=6.1-1.2X 4.1-3/2X+3X+5/2
1,7Y+6=-6Y 2.2Y-3=7Y=7 3.0.5X-0.7=6.1-1.2X 4.1-3/2X+3X+5/2
1, 7Y+6=-6Y
13Y=-6
Y=-6/13
2. 2Y-3=7Y-7
5Y=4
Y=4/5
3. 0.5X-0.7=6.1-1.2X
1.7X=6.8
X=4
4. 1-3/2X+3X+5/2=0
1.5X=-3.5
X=-7/3
(y+1)分之(2y+3)=(3y+4)分之(6y+7)
[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),'.')
已知:2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x)
(y^2)^4y-(-2y)^3y^6=
2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1
(y-4)(3y+2)-(3y-7)(2y+1),其中y=4/3
1.4(x-y-1)=3(1-y)-22/x+3/y=22.5(x+y)-6=43x+3y+7y=10
(1)y+1/y=5/2 (2) 2y+6/y=7 (3) y+1/y+2=0
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
解方程:4y-3(20-y)=6y-7(11-y)
4y-3(20-y)=6y-7(9-y)解方程
4y-3(20-y)=6y-7(11-y)
4y-3(20-y)=6y-7(9-y)咋解?
4y-3(20-y)=6y-7(9+y)解方程
解方程4y-3(20-y)=6y-7(11-y)求过程
4y-3(20-y)=6y-7(11-y) 解方程