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Is x^3*y^2*z > 0 ? 1)xyz > 0 2)x*Y^2 > 0 Thanks

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Is x^3*y^2*z > 0 ? 1)xyz > 0 2)x*Y^2 > 0 Thanks [#permalink]

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09 Oct 2003, 17:04
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Is x^3*y^2*z > 0 ?

1)xyz > 0
2)x*Y^2 > 0

Thanks
Praetorian
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Joined: 26 Aug 2003
Posts: 233
Location: United States
Followers: 1

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09 Oct 2003, 17:48
E?

We have to find whether x and z are negative.

(1) Any two of those three could be negative.
(2) Ok, so x is not negative, but doesn't say anything about y.
(combined) x is positive but either y and/or z could be negative.

None works.
09 Oct 2003, 17:48
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Is x^3*y^2*z > 0 ? 1)xyz > 0 2)x*Y^2 > 0 Thanks

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