(2ab²)-²/(a-²b)³

问题描述:

(2ab²)-²/(a-²b)³

(2ab²)-²/(a-²b)³解,得:==1/(2ab²)²*[1/(a^-6*b³)]==1/(2ab²)²*[1/(b³/a^6)]==1/(4a^2b^4)*(a^6/b³)==a^4/4b^7