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#### If P= x^a+b/x^b what is p?

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 Post subject: If P= x^a+b/x^b what is p?  Posted: Fri Aug 31, 2012 1:52 am
 Course Students

Posts: 1
 Algebra strategy guide, 5th edition. Chapter 8, question 8:If P= x^a+b/x^b what is value of positive integer p?a. x=52. a=0The Answer is B but it goes on to say that Statement 1 is Sufficient and Statement 2 is Insufficient. Maybe that's an error?Anyhow, I was able to simplify the equation to x^a but then I was stumped. Can you tell me how to move forward on this question?Thanks so much,Ariadna

 Post subject: Re: If P= x^a+b/x^b what is p?  Posted: Wed Sep 05, 2012 3:35 am
 ManhattanGMAT Staff

Posts: 8087
 you simplified the expression to give x^a. that's 90% of the problem, right there.statement 1:now you're looking for the value of 5^a. that can have lots and lots and lots of different values.not sufficient.statement 2:now you're looking for the value of x^0. if x is a positive integer, x^0 is always 1.sufficient.if the words "not sufficient" and "sufficient" are indeed reversed in the answer key, please go to this link, select "Errata", and submit your correction:http://www.manhattangmat.com/contact_form.cfmthanks in advance. _________________Being well-dressed gives a feeling of inward tranquillity [that] religion is powerless to bestow.C.F. Forbes

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