数学问题3
当a为何值时,关于x的方程 (x+1)/(x+2)-x/(x-1)=a/(x*x+x-2)
最好有过程``谢谢了
参考答案:(x+1)/(x+2)-x/(x-1)=a/(x+2)(x-1)
(x+1)(x-1)/(x+2)(x-1)-x(x+2)/(x-1)(x+2)=a/(x+2)(x-1)
-(2x+1)/(x+2)(x-1)=a/(x+2)(x-1)
-(2x+1)=a
当a为何值时,关于x的方程 (x+1)/(x+2)-x/(x-1)=a/(x*x+x-2)
最好有过程``谢谢了
参考答案:(x+1)/(x+2)-x/(x-1)=a/(x+2)(x-1)
(x+1)(x-1)/(x+2)(x-1)-x(x+2)/(x-1)(x+2)=a/(x+2)(x-1)
-(2x+1)/(x+2)(x-1)=a/(x+2)(x-1)
-(2x+1)=a