Question

已知81的m次方除以9的m次方除以3的m次方=27，求m的值

Answer 1

81的m次方除以9的m次方除以3的m次方=27
解：∵3的4m次方÷3的2m次方÷3的m次方=3³
3的（4m-2m-m）次方=3³
3的m次方=3³
∴m=3

Answer 2

(81^m/(9^m))/(3^m)
=(9^m)/(3^m)
=3^m=27=3^3
所以m=3