2^(2m)×2^(3m-3)÷2^m=2^9
2^(4m-3)=2^9
4m-3=9
m=3麻烦讲解一下为什么？2^(2m)×2^(3m-3)÷2^m=2^94=2²4^m=(2²)^m=2^(2m) 同理8^(m-1)=2^[3(m-1)]=2^(3m-3)512=2^92^(4m-3)=2^92^(2m+3m-3-m)=2^9 4m-3=9指数相等m=3