Question

学完幂的运算性质,老师给同学们出了一道题:已知3的m次方=6,9的n次方=2求3的2m-4n+

1次方

Answer 1

您好：

9的n次方=2
3的2n次方=2

3的2m-4n+1次方
=3*3的2m-4n次方
=3*（3的m-2n次方）²
=3*（3的m次方/3的2n次方）²
=3*（6/2）²
=3*9
=27

不明白，可以追问如有帮助，记得采纳，
谢谢 祝学习进步！

Answer 2

3^(2m-4n+1)
=[(3^m)^2/(3^n)^4]*3
=[(3^m)^2/(9^n)^2]*3
=6^2/(2^2)*3
=(36/4)*3
=108/4
=27不懂的欢迎追问，如有帮助请采纳，谢谢!

Answer 3

三的2m加三加一次方。

Answer 4

3^(2m-4n+1)
=[(3^m)^2/(3^n)^4]*3
=[(3^m)^2/(9^n)^2]*3
=6^2/(2^2)*3
=(36/4)*3
=108/4
=27