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20 Jan 2007, 19:05
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Hi,
the solution says A is the answer, but I think D should be the answer because, you can solve for B, given any number of n, and determine if side of the equality equals the other...(given that x > 0)...
so both solutions should work.. any thoughts??
the solution says A is the answer, but I think D should be the answer because, you can solve for B, given any number of n, and determine if side of the equality equals the other...(given that x > 0)...
so both solutions should work.. any thoughts??
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
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21 Jan 2007, 04:29
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First of all, welcome to the GMATClub 
After that, I agree with Andr359. It's better to post the question in order to recieve replies
By the way, I have looked at the question 142 in OG 11/Section DS. But, as u speak about an integer n?, I'm not 100% sure that the question that I look is the one that u have a problem with.
The question is asking basically 9^(x) + 9^(-x) = b ?
The first statment is right. U have already powered by 2 the equation and found the equality that we are looking for.
The second is just saying us x > 0. But, we have no relationship between x and b. In other words, 9^(x) + 9^(-x) = 4*a or 9^(x) + 9^(-x) = 2 or so on. We have no clue about 9^(x) + 9^(-x) = b for sure. That is insufficient
After that, I agree with Andr359. It's better to post the question in order to recieve replies
By the way, I have looked at the question 142 in OG 11/Section DS. But, as u speak about an integer n?, I'm not 100% sure that the question that I look is the one that u have a problem with.
The question is asking basically 9^(x) + 9^(-x) = b ?
The first statment is right. U have already powered by 2 the equation and found the equality that we are looking for.
The second is just saying us x > 0. But, we have no relationship between x and b. In other words, 9^(x) + 9^(-x) = 4*a or 9^(x) + 9^(-x) = 2 or so on. We have no clue about 9^(x) + 9^(-x) = b for sure. That is insufficient
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
