计算:3a^(m+1)b^(n+1)÷(-1/3a^mb^n-2)*(-1/9b)^2
问题描述:
计算:3a^(m+1)b^(n+1)÷(-1/3a^mb^n-2)*(-1/9b)^2
答
3a^(m+1)b^(n+1)÷(-1/3a^mb^n-2)*(-1/9b)^2
=3a^(m+1)b^(n+1)÷(-1/3a^mb^n-2)×1/81b^2
= -1/9a^(m+1-m)m^(n+1-n+2+2)
= -1/9ab^5