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  # What is the value of R? 1. R^R = R 2.
  
  Author Message
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  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
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  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
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  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
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  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
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: 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.
  
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  # 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
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