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Newbie | Next Rank: 10 Posts
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by Mia09 » Sun Aug 23, 2009 2:12 am
The symbol ? represents one of the following operations: +,/,*,-.Which operation does ? represent.

1)(a^3/a^2)?a=1
2)a-1>0

OA is C. In my opinion it is A as there is no need for the second condition,Please Help
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Source: — Data Sufficiency |
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by Bryant@VeritasPrep » Sun Aug 23, 2009 5:43 am
I believe they require the second condition, because if a is a negative number, or zero, the formula (using division as the symbol for ?) is innacurate.
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by m&m » Sun Aug 23, 2009 12:33 pm
C is required because you can have:

0.5+0.5
or 1*1
or anything other than 0/anything other than 0

so by restricting a>1 you can narrow to the 3rd option

HOpe that helps
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