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What does exclusive mean?

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What does exclusive mean? [#permalink] New post 14 Oct 2006, 12:57
Hey guys,
I'm new here and I had a question about exclusiveness if anyone could answer for me. What does exclusive mean? I'll give you a data sufficiency question to make it clear -

Is y between 1 and 2, exclusive?
(1) y^2 is less than y
(2) y^2 + y is between 1 and 2, exclusive

If someone could tell me the answer and why you came to the answer, that would be awesome. Thanks.
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Re: What does exclusive mean? [#permalink] New post 14 Oct 2006, 13:16
I would interpret exclusive as, y is between 1 and 2, but does not include 1 and 2.

From 1, if y^2 < y, that means y is between 0 and 1

From 2, I think y is always less than 1.

So, answer is D since y can not be between 1 and 2

If exclusive wasn't used, then y could include 1 and 2 also. In that case, the answer would have been E ( from 2, 1^2+1 = 2, 0.7+ 0.7^2 = 1.19)

What is the OA?
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 [#permalink] New post 14 Oct 2006, 13:17
I believe exclusive should be the opposite of inclusive... :P

Whereas b/n 1 and 2, inclusive includes 1 and 2 as limits, exclusive limits the answer to only numbers strictly b/n and 1 and 2.

I agree with MST, its D

S1: y<= +/- sqrt of Y

S2: 1<y(y+1)<2
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 [#permalink] New post 14 Oct 2006, 14:39
Hi and welcome D :-D :-D :-D :-D

i would agree opposite of inclusive, so

exclusive:
1 < y < 2

inclusive:
1<= y <= 2

Is y between 1 and 2, exclusive?
(1) y^2 is less than y
(2) y^2 + y is between 1 and 2, exclusive

I) y^2 < y, y must be a fraction ( 0 < y < 1 ) SUFF
II) again 0 < y < 1 (e.g 5/8^2 + 5/8 = 25/64 + 40/64 = 65/64) SUFF
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 [#permalink] New post 14 Oct 2006, 19:57
Yeah, the answer is D. Thanks for answering.
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 [#permalink] New post 14 Oct 2006, 23:14
alobs wrote:
Yeah, the answer is D. Thanks for answering.


Note that the word exclusive is redundant here. If x is between a and b and a<b, we write a<x<b.
  [#permalink] 14 Oct 2006, 23:14
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