Question

3的m次方=6，9的n次方=2.求3的2m-4n 1次方的值

Answer 1

3的m次方=6，9的n次方=2
所以3的2n次方=2

所以3的2m-4n+1次方
=3的2m次方÷3的4n次方×3的1次方
=(3的m次方)²÷(3的2n次方)²×3
=6²÷2²×3
=27

Answer 2

因为3^m=6，9^n=2,
所以3^(2*m-4*n+1)=3^(2*m)/3^(4*n)*3
=(3^m)^2/(3^2)^(2*n)*3
=6^2/(9^n)^2*3
=36/2^2*3
=9*3
=27