Any approach other than Picking numbers??

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

adi_800: Legendary Member; Posts: 544; Joined: Thu Oct 08, 2009 9:14 am; Location: Pune, India; Thanked: 31 times; Followed by:2 members

by adi_800 » Sat Oct 08, 2011 11:31 pm

If a and n are positive numbers, does 2a^x = n ?

(1) a^x + 1/a^x = Sqrt(n+2)

(2) x > 0

Source: Beat The GMAT — Data Sufficiency | Sat Oct 08, 2011 11:31 pm

shankar.ashwin: Legendary Member; Posts: 966; Joined: Sat Jan 02, 2010 8:06 am; Thanked: 230 times; Followed by:21 members

by shankar.ashwin » Mon Oct 10, 2011 12:06 am

C IMO

adi_800 wrote:If a and n are positive numbers, does 2a^x = n ?

(1) a^x + 1/a^x = Sqrt(n+2)

(2) x > 0

• Page 1 of 1