解
6√(√x*3√y)
=6√[x^(1/2)*y^(1/3)]
=[x^(1/2)*y^(1/3)]^(1/6)
=x^(1/2*1/6)y^(1/3*1/6)
=x^(1/12)y^(1/18)
完事.
开心愉快.