5y+4/3+y-1/4=2-5y-5/12
解3y+5/3y-6=1/2+5y-4/2y-4
微分方程(1)(y'')^2+5y'-y+x=0;(2)y''+5y'+4y^2-8x=0;(3)(3x+2y)dx+(
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
(2y-3)(-y+4)=(y-2)(y-5)-3y(y-7/3)解方程
5y+4/3+y-1/4=2-5y-5/12
(-y+5+4y^2)-(-y^2+5y-4),其中y=-2
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)
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
求下列微分方程的通解或特解:(1) 3y''-2y'-8y=0 (2) 4y"-8y'+5y=0
解方程:(y+4)/5+y+6=(y+8)/2-(y+4)/3