4Y-2Y=1.2000000
先化简,在求值:6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y=
(-y+5+4y^2)-(-y^2+5y-4),其中y=-2
解分式方程 2/y-y/(y-2)=4/(y²-2y)
解微分方程 y'=[e^(y^2)]/2xye^(y^2)+4y,y|(x
2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
(2y-3)(-y+4)=(y-2)(y-5)-3y(y-7/3)解方程
8y²-2=4y
解分式方程6y+12/y^2+4y+4 -y^2-4/y^2-4y+4 +y^2/y^2-4=0
2y''+y'-y=0
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
解3y+5/3y-6=1/2+5y-4/2y-4