1.3a¯²b.2ab¯².
问题描述:
1.3a¯²b.2ab¯².
2.4xy²z÷(-2x¯²yz¯¹)
3.(-3ab¯¹)³
4.(2m²n¯²)² .3m¯³n³.注:“¯¹ ¯² ¯³ " 代表负指数
答
1.3a¯²b.2ab¯²=6a^(-2+1).b^(1-2)=6a^-1.b^-1.2 4xy²z÷(-2x¯²yz¯¹)=(4/-2)*x^(1+2)*y^(2-1)*z^(1+1)=-2x^3y^1z^2.3 (-3ab¯¹)³=(-3)^3*a^(1*3)b^(-1...