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Manager
Joined: 28 Sep 2011
Posts: 68
Location: United States
GMAT 1: 520 Q34 V27
GMAT 2: 550 Q V
GMAT 3: 690 Q47 V38
GPA: 3.01
WE: Information Technology (Commercial Banking)
Followers: 1

Kudos [?]: 14 [0], given: 9

I was working in this problem what-is-the-value-of-integer-j-1-j-j-1-2-j-j-81006.html. The answer is D, but I thought B could have two values, 0 and 1.
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Kaplan GMAT Instructor
Joined: 25 Aug 2009
Posts: 644
Location: Cambridge, MA
Followers: 63

Kudos [?]: 163 [1] , given: 2

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Expert's post
0^0 is equal to 1 in most mathematical conventions, but not all. Therefore, you can expect that GMAT not to test the subject--it won't show up, and you won't be expected to know it!
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Eli Meyer
Kaplan Teacher
http://www.kaptest.com/GMAT

Prepare with Kaplan and save $150 on a course! Kaplan Reviews Manager Joined: 28 Sep 2011 Posts: 68 Location: United States GMAT 1: 520 Q34 V27 GMAT 2: 550 Q V GMAT 3: 690 Q47 V38 GPA: 3.01 WE: Information Technology (Commercial Banking) Followers: 1 Kudos [?]: 14 [0], given: 9 Re: Question about 0^0 [#permalink] 23 Jul 2012, 20:27 Awesome, Thank you. BSchool Thread Master Status: If you think you can, then eventually you WILL! Joined: 05 Apr 2011 Posts: 400 Location: India Concentration: Finance, Marketing Schools: ISB '14 (D) GMAT 1: 570 Q49 V19 GMAT 2: 700 Q51 V31 GPA: 3 WE: Information Technology (Computer Software) Followers: 48 Kudos [?]: 189 [0], given: 39 Re: Question about 0^0 [#permalink] 02 Aug 2012, 02:06 GMAT never touches a topic which is not widely accepted. So, I dont think so that value of 0^0 will be the deciding factor in any GMAT Quant question. Meanwhile, I made a search for the same in internet. Interesting read: http://www.askamathematician.com/2010/1 ... -disagree/ _________________ Math Expert Joined: 02 Sep 2009 Posts: 16817 Followers: 2774 Kudos [?]: 17576 [0], given: 2225 Re: Question about 0^0 [#permalink] 09 Aug 2012, 03:34 Expert's post ashish8 wrote: I was working in this problem what-is-the-value-of-integer-j-1-j-j-1-2-j-j-81006.html. The answer is D, but I thought B could have two values, 0 and 1. QUESTION YOU ARE TALKING ABOUT SHOULD READ: If J\neq{0}, what is the value of J ? (1) |J| = J^{-1} (2) J^J = 1 Two reasons why should the stem state that J\neq{0}: For statement (1) if J=0 then we'll have 0^{-1}=\frac{1}{0}=undefined. Remember you can't raise zero to a negative power. For statement (2) if J=0 then we'll have 0^0. 0^0, in some sources equals to 1, some mathematicians say it's undefined. Anyway you won't need this for the GMAT because the case of 0^0 is not tested on the GMAT. So on the GMAT the possibility of 0^0 is always ruled out. Also notice that saying in the stem that J is an integer is a redundant. AS FOR THE SOLUTION: If J\neq{0}, what is the value of J ? (1) |J| = J^{-1} --> |J|*J=1 --> J=1 (here J can no way be a negative number, since in this case we would have |J|*J=positive*negative=negative\neq{1}). Sufficient. (2) J^J = 1 --> again only one solution: J=1. Sufficient. Answer: D. _________________ Intern Status: gmat fresher Joined: 07 Jun 2012 Posts: 25 GPA: 3.87 Followers: 5 Kudos [?]: 133 [0], given: 12 Re: Question about 0^0 [#permalink] 09 Aug 2012, 07:28 Thank you Bunuel.... Re: Question about 0^0 [#permalink] 09 Aug 2012, 07:28 Similar topics Replies Last post Similar Topics: Question about Wharton/Philadelphia 1 02 Jun 2004, 08:25 Few questions about Zero: 1) What is 0! (1?) 2) What is 0^0 14 16 Apr 2006, 09:21 9 Questions about trickier exponent questions? 6 27 Jan 2008, 09:24 question about $ 24 22 Apr 2008, 21:37
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