解方程,补充
问题描述:
解方程,补充
x+1/(x+1)=a+1/(a+1)
答
∵x+1/(x+1)=a+1/(a+1),
∴(x+1)+1/(x+1)=(a+1)+1/(a+1),
∴(x+1)^2-[(a+1)+1/(a+1)]x+1=0,
∴[(x+1)-(a+1)][(x+1)-1/(a+1)]=0,
∴(x-a)[x+a/(a+1)]=0,
∴x=a,或x=-a/(a+1).