计算:1/x^2yz-2/xy^2z+3/xyz^2

问题描述:

计算:1/x^2yz-2/xy^2z+3/xyz^2

1/x^2yz-2/xy^2z+3/xyz^2
=yz/x²y²z²-2xz/x²y²z²+3xy/x²y²z²
=(yz-2xz+3xy)/x²y²z²