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

 It is currently 26 Apr 2015, 17:54

### 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

# What is the value of R? 1. R^R = R 2.

Author Message
TAGS:
Senior Manager
Joined: 06 Jul 2006
Posts: 295
Location: SFO Bay Area
Schools: Berkeley Haas
Followers: 2

Kudos [?]: 35 [0], given: 0

What is the value of R? 1. R^R = R 2. [#permalink]  05 Mar 2008, 16:46
What is the value of R?

1. $R^R = R$
2. $(\frac{1}{R})^R = R$
Director
Joined: 10 Sep 2007
Posts: 949
Followers: 7

Kudos [?]: 205 [0], given: 0

Re: Maths: What is the value of R? [#permalink]  05 Mar 2008, 16:57
Statement 1:
R^R = R => R^R-1 = 1 => (R-1) log R = 0 => (R-1) = 1 or R = 1

Statement 2:
1 = R^(R+1) => (R+1) log R = 0 => R = -1

Director
Joined: 14 Jan 2007
Posts: 780
Followers: 2

Kudos [?]: 71 [0], given: 0

Re: Maths: What is the value of R? [#permalink]  05 Mar 2008, 17:00
Should be 'E'

Stmt1: Possible values of R = 0,1,-1
Insuff

Stmt2: Possible values of R = 1,-1
Insuff

Taking them together: R =1,-1
Still Insuff
Manager
Joined: 12 Feb 2008
Posts: 181
Followers: 1

Kudos [?]: 33 [0], given: 0

Re: Maths: What is the value of R? [#permalink]  05 Mar 2008, 17:06
suntaurian wrote:
What is the value of R?

1. $R^R = R$
2. $(\frac{1}{R})^R = R$

i think R can be -1 or 1.

what is the OA?
Senior Manager
Joined: 06 Jul 2006
Posts: 295
Location: SFO Bay Area
Schools: Berkeley Haas
Followers: 2

Kudos [?]: 35 [0], given: 0

Re: Maths: What is the value of R? [#permalink]  05 Mar 2008, 21:32
OA is E.

R can be both 1 and -1.
Re: Maths: What is the value of R?   [#permalink] 05 Mar 2008, 21:32
Similar topics Replies Last post
Similar
Topics:
1 Is 1/p > r/(r^2 +2) 19 05 Jul 2006, 20:38
16 Is 1/p > r/(r^2 + 2)? 20 01 Nov 2009, 15:06
What is the value of R? 1. R^R = R 2. (1/R)^R = R Can 9 08 Nov 2007, 03:34
is 1/p > r/(r^2+2) 6 04 Aug 2007, 06:25
Find an integer R. (1) (|R|)!=1 (2) |R|=R 9 13 May 2007, 20:39
Display posts from previous: Sort by