化简,(√x-2)÷ (√x/x³-2x²)

问题描述:

化简,(√x-2)÷ (√x/x³-2x²)

因为√x要有意义,所以x>=0
(√x-2)÷ √x/(x³-2x²)
=(√x-2)÷ (√1/x²(x-2))
=√(x-2)*1/x²(x-2)
=√1/x²
=1/x