(y+1)(2y+3)+8>(1+2y)(1+y)

y (3y^2+8y-3)-6y(3y+2y-1)+9y 通分 y+3/y*y-6y+9,1/2y+6,y-1/y*y-9 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 (y+1)(2y+3)+8>(1+2y)(1+y) 急,看不懂问我(y+3)^2/8-y=(y+3)/4-(y-1)/2 4y²-4y/y²-2y+1÷(y+1/y-1-y-1/y+1)÷(3y+3) [T,Y]=ode45(@rigid,[0 1],[rand(15,1)]);plot(T,Y(:,1),'-',T,Y(:,2),'-.',T,Y(:,3),'.',T,Y(:,4),'-',T,Y(:,5),'-.',T,Y(:,6),'.',T,Y(:,7),'-',T,Y(:,8),'-.',T,Y(:,9),'.',T,Y(:,10),'-',T,Y(:,11),'-.',T,Y(:,12),'-.',T,Y(:,13),'.',T,Y(:,14),'-',T,Y(:,15),'.') 计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8) 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) 5y∧2-(y-2)(3y+1)-2(y+1)(y-5) 2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1 解方程：3y²-(2y+1)(y-2)=(y-5)(y+1) (y-4)(3y+2)-(3y-7)(2y+1),其中y=4/3 解分式方程（y+3)/(y^2+y)-1/(1-y)=4/y要过程 Y(Y-1)-(y-2)*(y+3)=2 Y的解是多少?