(1)y+1/y=5/2 (2) 2y+6/y=7 (3) y+1/y+2=0

y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 方程y''=(1+y'*y')/2y的通解 解方程3y^2-(2y+1)(y-2)=(y-5)(y-1) 解方程：3y^2-(2y+1)(y-1)=(y-5)(y+1) 解方程：3y²-(2y+1)(y-2)=(y-5)(y+1) 2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1 y'=1+y^2 1/2y+1=4y-2/5-y y-(y-1)/2=1-(2y-3)/5 y-y-1/2=2-y+5/5一元一次方程 y-y-1/2=3-y+2/5 y-2分之y-1=-5分之y+2 5y=2y²+1 2y-1=5y+7 2y+1=5y+7 y-1/y-2 - y-3/y-4=y-2/y-3 - y-4/y-5一共有四个分数哦~希望可以快一点~谢谢!