二分之(3-根号5)除以二分之根号5减一

2025-03-02 15:02:57
推荐回答(3个)
回答1:

二分之(3-根号5)除以二分之(根号5减一)

=(3-根号5)/2×2/(根号5-1)
=(3-根号5)/(根号5-1)
=(3-根号5)(根号5+1)/(5-1)
=(3根号5-5+3-根号5)/4
=(2根号5-2)/4
=(根号5-1)/2

回答2:

解:﹙3-√5﹚/2÷﹙√5-1﹚/2
=﹙3-√5﹚/﹙√5-1﹚
=﹙3-√5﹚﹙√5-1﹚/4
=﹙4√5-8﹚/4
=√5-2.

回答3:

(3-√5﹚/2÷(√5﹣1﹚/2=﹙3-√5﹚/﹙√5-1﹚=﹙3﹣√5﹚﹙√5﹢1﹚/﹙√5﹣1﹚﹙√5﹢1﹚
=﹙2√5﹣2﹚/4=﹙√5﹣1﹚/2