(根号y分之x-根号x分之y)除以(根号y分之1-根号x分之1)

问题描述:

(根号y分之x-根号x分之y)除以(根号y分之1-根号x分之1)

(根号y分之x-根号x分之y)除以(根号y分之1-根号x分之1)
=[(x-y)/根号xy]÷[(根号x-根号y)/根号xy]
=根号x+根号y