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# IF x and y are positive is x^3>y? 1) squareroot of x >

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Senior Manager
Joined: 14 Jul 2006
Posts: 281
IF x and y are positive is x^3>y? 1) squareroot of x > [#permalink]

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21 Aug 2006, 23:26
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IF x and y are positive is x^3>y?

1) squareroot of x > y
2) x>y

Arrived at the answer by plugging numbers. Im looking for a mathematical solution though. Thanks
CEO
Joined: 20 Nov 2005
Posts: 2894
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008

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22 Aug 2006, 00:53
Don't know any mathematical solution. I also plugged in numbers and found the answer as E.
For both statements
x = 1/4 y = 1/5 x^3 is less than y
x = 9, y = 2 x^3 is greater than y
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SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Senior Manager
Joined: 14 Jul 2006
Posts: 281

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22 Aug 2006, 02:50
Thanks PS_dahiya
22 Aug 2006, 02:50
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