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Minimum possible value of f(x)

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by winnerhere » Mon Aug 30, 2010 8:28 pm
A function f(x) is defined for a real variable x, as f(x) = max{ 3x+8, 25 - 4x, 12 -x}. The minimum possible value of f(x) is

1) - infinity

2) 11

3) 23/3

4) 107/7

5) 25

Thanks in advance,
Sai
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by sanju09 » Mon Aug 30, 2010 9:00 pm
winnerhere wrote:A function f(x) is defined for a real variable x, as f(x) = max{ 3x+8, 25 - 4x, 12 -x}. The minimum possible value of f(x) is

1) - infinity

2) 11

3) 23/3

4) 107/7

5) 25

Thanks in advance,
Sai
-infinity is the best choice there

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by KrazyKarl » Mon Aug 30, 2010 9:19 pm
Is this a real GMAT question? It seems unclear to me what it's asking to do.

-Infinity seems kind of obvious as a minimum value of anything, but that's too easy I think. Where do the other answer choices come from?
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by winnerhere » Mon Aug 30, 2010 10:00 pm
sanju,

it is mentioned as max{} in the f(x) definiton. :)

- infinity is not the answer...

ITS NOT TAKEN FROM GMAT SOURCE
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