Question

2的m次方·4的m次方·8的m次方=2的18次方 则m=

Answer 1

2^m×4^m×8^m=2^m×(2^2)^m×(2^3)^m

=2^m×2^2m×2^3m

=2^(m+2m+3m)

=2^6m=2^18

∴6m=18

m=3