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Is x + y > 0 ? (I) x - y > 1 (II) x/y + 1 > 0 Can

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Manager
Joined: 11 Apr 2009
Posts: 168
Followers: 2

Kudos [?]: 32 [0], given: 5

Is x + y > 0 ? (I) x - y > 1 (II) x/y + 1 > 0 Can [#permalink]  07 May 2009, 14:18
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Is x + y > 0 ?
(I) x² - y² > 1
(II) x/y + 1 > 0

Can someone explain in detail? Thanks
Manager
Joined: 11 Apr 2009
Posts: 168
Followers: 2

Kudos [?]: 32 [0], given: 5

Re: DS: Inequality [#permalink]  07 May 2009, 18:25
Can anyone give a detailed explanation for this problem?
Senior Manager
Joined: 08 Jan 2009
Posts: 329
Followers: 2

Kudos [?]: 88 [0], given: 5

Re: DS: Inequality [#permalink]  07 May 2009, 21:31
Is x + y > 0 ?

stmt 1 :
x^2 - y^ 2 > 1
(x + y)( x-y) > 1
both (x + y),( x-y) are +ve or both (x + y),( x-y) are -ve . Insufficient

stmt 2 :
x + y / y > 0
both (x+y),y are +ve or (x+y),y are -ve. Insufficient.

Combinig Insufficient. AnS E
Re: DS: Inequality   [#permalink] 07 May 2009, 21:31
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