1-X分之3=X-1分之X在-5
1-X分之3=X-1分之X在-5
3/(1-x)=(x-5)/(x-1) 3=5-x x=2.代入原方程检验知x=2为原方程的解。注:分式方程、无理方程等其根需检验。
1-X分之3=X-1分之X在-5 3/(1-x)=[x/(x-1)]-5 ===> 3/(1-x)-x/(x-1)=-5 ===> 3/(1-x)+x/(1-x)=-5 ===> (3+x)/(1-x)=-5 ===> 3+x=-5*(1-x) ===> 3+x=-5+5x ===> 4x=8 ===> x=2
答:解:x≠0, -1 (x-1)/x-(1-x)/(x+1)=2 (x-1)(x+1)/x(x+1)-(1-x)x/x(x+1)-2x(x+1)/x(x+1)=0...详情>>
答:详情>>