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inequity

by magical cook » Sun Dec 09, 2007 5:44 am
which of the following inequities has a solution set that, when graphed on the number line, is a single line segment of finite length?

a) x^4>1
b) x^3<27>16
d)2 > lxl <5
e) 2<3x+4<6

[spoiler]
although c is not the answer but I am wondering why c is not -3<x<3..... [/spoiler]
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by jayhawk2001 » Sun Dec 09, 2007 8:37 am
Only E seems to be finite and bounded.

Can you please post option C. I don't see a choice 'c' in the
question
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by magical cook » Sun Dec 09, 2007 9:27 am
Hi

sorry, option C) is c^3>27 (I dont know how to 'expand' this )

Yes, OA is E but I also want to know why C is wrong. (I thought -3<x<3..)



By the way, it's good to see you on the forum again!
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by hemanth28 » Sun Dec 09, 2007 10:52 am
C^3>27

=>C>3 ..which is not finite.So the answer is (E)
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by gmatguy16 » Sun Dec 09, 2007 4:29 pm
can someone please explain why b is not a valid choice?
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by magical cook » Sun Dec 09, 2007 5:08 pm
Sorry, b) is supposed to be x^4>16. :oops:
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by hemanth28 » Sun Dec 09, 2007 7:05 pm
x^4>16

solving
x<2>2 ...so B is not right.[/i]
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