2(1/x + 1/x-4)+2/x =14/x +2/x-4 =14x-16+2x=x^2-4xx^2-10x+16=0(x-8)(x-2)=0x=8 #
2(1/x + 1/x-4)+2/x =1這OK4/x +2/x-4 =1這不對應該是6/x -8 =16/x=9x=3/2