3的2x+3y+3的次幂=1=3^0
所以2x+3y+3=0
即2x+3y=-3

4的x次幂乘以8的y次幂
=2^(2x)*2^(3y)
=2^(2x+3y)
=2^(-3)
=1/8

祝学习进步