若m+1⼀m=根号5,则正数m-1⼀m的平方根是?

2025-02-27 14:22:25
推荐回答(2个)
回答1:

m+1/m=根号5
(m+1/m)^2=5
m^2+2+1/m^2=5
m^2+1/m^2=3
(m-1/m)
=m^2-2+1/m^2
=3-2=1

回答2:

【(根号5)+1】/4