=3²-2^8÷2^4+(-2)
=9-16-2
=-9我要这个的题的详细步骤3³×(1/3)-2的八次方÷4²+(-2)的1+2n次方×(-1/2)的2n次方=3²×3×1/3-4^4÷4²+(-2)×(-2)^2n×(-1/2)^2n=3²-4²-2=9-16-2=-18有那一步不懂吗？ok了，谢谢