> 数学 >
4^m*8^m-1*2^m的值是512,那么m的值是?
人气:488 ℃ 时间:2020-09-17 22:49:11
解答
4^m×8^(m-1)×2^m
=2^(2m)×2^[3(m-1)]×2^m
=2^[2m+3(m-1)+m]
=2^(6m-3)
=512
=2^9
6m-3=9
m=2
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版