If 36x = 8,100, what is the value of (3x – 1)3 ?
A. 90
B. 30
C. 10
D. 10/3
E.10/9
举报
3^(6X)=3^[(3X)*2]=90^2 ,so, 3^(3X)=90
[3^(X-1)]^3=3^(3x-3)=3^(3x)/27=90/27=10/3
so, the answer is D
谢谢ERSHAO
发表回复
手机版|ChaseDream|GMT+8, 2024-12-4 16:45 京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
ChaseDream 论坛
© 2003-2023 ChaseDream.com. All Rights Reserved.