x>1?

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x>1?

by mariah » Sat Feb 07, 2009 4:07 pm
131. x > 1?

(1) (x+1)( |x|-1) > 0
(2) |x| > 5

oa a

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by hypik21 » Sat Feb 07, 2009 6:18 pm
IMO A....using statement 2, x can be < -5 or > 5..insuf

statement 1...both parts of the eq have to be either positive or negative..
if x is a negative fraction, you will come out with a negative number for |x-1| and a positive number for x+1...so |x| has to be >1 for equation number 1 to work...