2-(4-y)=6y-2(y+1)
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2-(4-y)=6y-2(y+1)
2-(4-y)=6y-2(y+1)
2-(4-y)=6y-2(y+1)
y=0
ychj
(y+1)分之(2y+3)=(3y+4)分之(6y+7)
对于(y一撇)y`=y/x(y-1)求导,我求的结果是y``=-y^2-y`x+y/x^2(y-1)^2 怎么不对啊,我的求导过程是:y`x(y-1) - [x(y-1)]` y y`xy-y`x-(y-1+xy`)y -y^2-y`x+yy``=-------------------------=----------------------=-----------------x^2 (y-1
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
(y^2)^4y-(-2y)^3y^6=
化简求值:(y-2)(y²-6y-9)-y(y²-2y-15)其中y=1/2
化简求值:【(x+Y)(X-Y)-(X-Y)的平方+2Y(2-Y)】除4Y,其中X=1 Y=2
(96/y²16)+(3y-1/4-y)=(2y-1/y+4)-5
解方程 y²+(1/y²)+2y+(2-6y/y)=0
解方程3y+1/y+2+2/2-y=3-(3y/y的平方-4)
2-(4-y)=6y-2(y+1)
2-(4-y)=6y-2(y+1)
(1-Y)²=2Y(Y+1)
y'=(y/x)^2+y/x+4微分方程
2-(4-y)=6y-2(y+1)
(y+2)=1+2y,
已知:【(x²+y²)-(x-y)²+2y(x-y)】÷4y=,求4x/(4²-y²)-1/(2x+y)的值已知:【(x²+y²)-(x-y)²+2y(x-y)】÷4y=1,求4x/(4²-y²)-1/(2x+y)的值
方程组:x(y+1)+2(y+1)=y(y-1)x-5(y-1) x(4+y)-y(8-x)=-20x(y+1)+2(y+1)=y(y-1)x-5(y-1) x(4+y)-y(8-x)=-20(这是一个方程组.)
常微分方程的通解dy/dx=(x-y+1)/(x+y-3)y^4=2y^n+y=0y''+6y'+9y=e^(-3x)y''+y'-2y=4e^(2x)