已知5m=3 ,25的n次方=11,求5的3m-2n次方的值

问题描述:

已知5m=3 ,25的n次方=11,求5的3m-2n次方的值

应该是5^m=3吧
25^n=11,5^2n=11
所以5^(3m-2n)=(5^m)^3÷5^2n=3³÷11=27/11

5^(3m-2n)
=5^(3m)/5^(2n)
=(5^m)^3/(5^2)^n
=(5^m)^3/25^n
=3^3/12
=27/11