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# X^4 + y^4=100. What would be the highest possible value for

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Intern
Joined: 24 May 2008
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X^4 + y^4=100. What would be the highest possible value for [#permalink]  29 May 2008, 00:32
X^4 + y^4=100. What would be the highest possible value for X?

A 0-3
B 3-6
C 6-9
D 9-12
E 12 -15

I guessed the answer 'A' but it seems the correct answer is 'B'. Can some one explain me why B is correct?

Regards,
Mahesh
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Regards,
Mahesh Vollala

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Joined: 24 Apr 2008
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Re: GMAT Prep test question [#permalink]  29 May 2008, 00:42
Coz max value of x is 100^1/4 >3 but less than 4.

3^4 = 81 4^4 = 256
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Re: GMAT Prep test question [#permalink]  29 May 2008, 02:47
I got it! Thanks for the response!
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Regards,
Mahesh Vollala

Re: GMAT Prep test question   [#permalink] 29 May 2008, 02:47
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