Question

根号15除以(根号3分之1+根号5分之1)

急急急！！！

Answer 1

V15/(V(1//3)+V(1/5))
=V15*V15/(V5+V3)
=15/2 (V5-V3)

追问

介绍能在详细些吗 我会追加分数的

追答

V15/[V(1/3)+V(1/5)]=V15/(V3/3+V5/5)=V15/(5V3/15+3V5/15)
=15V15/(5V3+3V5)
=15V15*(5V3-3V5)/[(5V3-3V5)*(5v3+3V5)]
=15[V15*(5V3-3V5)]/(75-45)
=15/2 *(15V5-15V3)
=225/2(V5-V3)

Answer 2

V15/(V(1/3)+V(1/5)
=V15/(V3/3+V5/5）
=V15*15／2(5V3-3V5)
==15/2 (V5-V3)