(-1/2x^2y)^-2÷(-2/3xy^2)=?
问题描述:
(-1/2x^2y)^-2÷(-2/3xy^2)=?
答
(-1/2x^2y)^-2÷(-2/3xy^2)=1/(1/2x²y)²*1/(-2/3xy²)
=1/(1/4x⁴y²)*1/(-2/3xy²)
=-4*3/2*1/(x⁴y²*xy²)
=-6/(x^5y⁴)