若x满足x²-5x-1=0,则x-1/x=?

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 05:54:43
若x满足x²-5x-1=0,则x-1/x=?

若x满足x²-5x-1=0,则x-1/x=?
若x满足x²-5x-1=0,则x-1/x=?

若x满足x²-5x-1=0,则x-1/x=?
x²-5x-1=0,
两边除以x得
x -5 -1/x=0
∴x -1/x=5

等式两边除以x
x-5-1/x=0
x-1/x=5