早教吧作业答案频道 -->数学-->
(a+b/2ab^2)^3/(a^2-b^2/ab^2)^2/{1/2(a-b)}^2,其中a=-1/2,b=2/3
题目详情
(a+b/2ab^2)^3/(a^2-b^2/ab^2)^2/{1/2(a-b)}^2,其中a=-1/2,b=2/3
▼优质解答
答案和解析
原式=[(a+b)^3/(8a^3b^6)*(1/4)*(a-b)^2]/{[(a+b)^2(a-b)^2]/(a^2b^4)}
=[(a+b)/8a^3b^6]*a^2b^4*(1/4)
=1/32(a+b)/(ab^2)
=1/32×(-1/2+2/3)/[(-1/2)*(4/9)]
=-3/128
=[(a+b)/8a^3b^6]*a^2b^4*(1/4)
=1/32(a+b)/(ab^2)
=1/32×(-1/2+2/3)/[(-1/2)*(4/9)]
=-3/128
看了 (a+b/2ab^2)^3/...的网友还看了以下：