作业帮[（-3ab）²×a³+2a³×（-3ab）³×1/2b]÷（3a²b²）² ,其中a=1/3,b=-b=-(1/2)
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/08 08:37:20
![[（-3ab）²×a³+2a³×（-3ab）³×1/2b]÷（3a²b²）² ,其中a=1/3,b=-b=-(1/2)](/uploads/image/z/765315-27-5.jpg?t=%5B%EF%BC%88-3ab%EF%BC%89%26%23178%3B%C3%97a%26%23179%3B%2B2a%26%23179%3B%C3%97%EF%BC%88-3ab%EF%BC%89%26%23179%3B%C3%971%2F2b%5D%C3%B7%EF%BC%883a%26%23178%3Bb%26%23178%3B%EF%BC%89%26%23178%3B+%2C%E5%85%B6%E4%B8%ADa%3D1%2F3%2Cb%3D-b%3D-%281%2F2%29)
[（-3ab）²×a³+2a³×（-3ab）³×1/2b]÷（3a²b²）² ,其中a=1/3,b=-b=-(1/2)
[（-3ab）²×a³+2a³×（-3ab）³×1/2b]÷（3a²b²）² ,其中a=1/3,b=-
b=-(1/2)
[（-3ab）²×a³+2a³×（-3ab）³×1/2b]÷（3a²b²）² ,其中a=1/3,b=-b=-(1/2)
[（-3ab）²×a³+2a³×（-3ab）³×1/2b]÷（3a²b²）²
=[-3a^5b^2-3a^6b^2]÷9a^4b^4
=-a/3b^2-a^2/3b^2
=-a/3b^2*(a-1)
=-a/3b^2*0
=0