BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

QUESTION 4

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Legendary Member
Posts: 2467
Joined: Thu Aug 28, 2008 6:14 pm
Thanked: 331 times
Followed by:11 members

by cramya » Wed Nov 26, 2008 9:27 pm
Expand (3^x-1) ^3 ((a^b)^c = a^ (b*c) where a=3 b=x-1 c=3)

3^(3x-3)

= 3^3x/ 3 ^3
= sqrt(3^6x) / 27
= sqrt(8100) / 27
= 90/27
= 10/3

I think one of the choices should be 10/3 since 10/0 is undefined.
Top
Post new topic Post Reply
• Page 1 of 1