Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 07 Jul 2015, 07:34

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# N is positive integer, 3^(-n/2) < 1/81, N

Author Message
TAGS:
Manager
Joined: 16 Oct 2006
Posts: 167
Followers: 1

Kudos [?]: 54 [0], given: 0

N is positive integer, 3^(-n/2) < 1/81, N [#permalink]  26 Oct 2006, 19:05
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
N is positive integer, 3^(-n/2) < 1/81, N ?
SVP
Joined: 01 May 2006
Posts: 1798
Followers: 8

Kudos [?]: 102 [0], given: 0

Agree with Tennis_Ball

3^(-n/2) < 1/81
<=> 3^(-n/2) < 3^(-4)
=> ln(3^(-n/2)) < ln(3^(-4)) as the ln fonction increases when x increases
<=> (-n/2)*ln(3) < (-4)*ln(3)
<=> -n/2 < -4
<=> n > 8
Similar topics Replies Last post
Similar
Topics:
13 If m^3-n^2=-300, then the lowest possible value of m is 10 01 Apr 2013, 00:22
8 Integers 3n+2 and 8n+3 are divisible by an integer p. If p 6 13 Mar 2012, 18:10
11 If n is a positive integer, then n(n+1)(n+2) is 25 10 Jul 2006, 06:56
6 r=3^(n+2), then in terms of r, 9^n= 4 19 Feb 2011, 07:47
9 If (n-2)! = (n! + (n-1)!)/99, and n is a positive integer, then n=? 13 21 Nov 2010, 18:21
Display posts from previous: Sort by