Is z + z < z I ) -4z < 4z 2 ) z^3 < z^2 : DS Archive
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# Is z + z < z I ) -4z < 4z 2 ) z^3 < z^2

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Director
Joined: 07 Jun 2004
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Is z + z < z I ) -4z < 4z 2 ) z^3 < z^2 [#permalink]

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17 Jan 2005, 19:11
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0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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Is z + z < z

I ) -4z < 4z

2 ) z^3 < z^2
VP
Joined: 18 Nov 2004
Posts: 1440
Followers: 2

Kudos [?]: 38 [0], given: 0

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17 Jan 2005, 19:19
"A" it is.

From the ques it asks

Is z<0 ?

State 1 : -z < z = 2z > 0 ...so z > 0...suff

State 2: z3 < z2 ===> z < 1...insuff
Director
Joined: 31 Aug 2004
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Kudos [?]: 121 [0], given: 0

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18 Jan 2005, 02:29
120% agree with the above answer...
The stem can be summarized in "is z<0" then statement 2 does not bring anything since z could be lower than 1

So answer is A
18 Jan 2005, 02:29
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# Is z + z < z I ) -4z < 4z 2 ) z^3 < z^2

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