3(2y+1)=2(1+y)+3(y+3)
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
微分方程y''-3y'+2y=5,y(0)=1,y'(0)=2求解过程
已知7/3*根号(9y)-y-2y*1/y=-2,求y的值
已知y满足不等式(-y+1/2)-y>2+(y+2/3),化简/y+1/+/2y-1/=_____ 急!
设函数y=y(x)满足微分方程y″-3y′+2y=2e^x 且曲线y=y(x)在(0.1)处与已知曲线y=x^4-x+1
用配方法解方程(1-y)(3y-2)=y(y-3)
解方程:3y^2-(2y+1)(y-1)=(y-5)(y+1)
解方程3y^2-(2y+1)(y-2)=(y-5)(y-1)
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
4(2y+3)=8(1-y)-5(y-2)
{x:y=3:4 (x-y):(y-1)=1:2
把方程(2y+1)(3y-2)=y²+2化成一般形式