若3x+2y=-2,则9的y次方乘以3的3x次方=
问题描述:
若3x+2y=-2,则9的y次方乘以3的3x次方=
答
9的y次方乘以3的3x次方
=3^2y×3^3x
=3^(2y+3x)
=3^(-2)
=1/9