将(√x-y)/(x-y)÷√(xy/x³-x²y)(x>y>0)化简
问题描述:
将(√x-y)/(x-y)÷√(xy/x³-x²y)(x>y>0)化简
答
原式=1/√(x-y)*√x(x-y)/√xy
=1/√(x-y)*√(x-y)/√y
=1/√y
=√y/y