Question

关于x的方程:x+1/x=2+1/2的解是X1=2,X2=1/2;x+1/x=3+1/3的解是X1=3,X2=1/3;x

Answer 1

y+（y+2）/(y+1)=y+1+1/(y+1)=(y+1)+1/(y+1)

设y+1=X,则原式=X+1/X=3+1/3

即y+1=3或1/3

y=2或-2/3