Question

0.001^x=1,(-3)^y=-1/27

Answer 1

奶奶的,错完了!

0.001^x=1

x=0(没听说任何数的零次方都为1)

(-3)^(-1)=-1/3

(-3)^(-3)=-1/27

(学过负次方吗?)

x=0,y=-3

x-y=3