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# if denotes the greatest integer less than or equal to x, is

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if denotes the greatest integer less than or equal to x, is [#permalink]

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09 Oct 2009, 08:57
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if [x] denotes the greatest integer less than or equal to x, is [x] = 0?
1) 5x+1=3+2x
2) 0<x<1

OA: D
Manager
Joined: 02 Jan 2009
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09 Oct 2009, 09:08
1
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Pajs14 wrote:
if [x] denotes the greatest integer less than or equal to x, is [x] = 0?
1) 5x+1=3+2x
2) 0<x<1

OA: D

[x] gives us the greatest INTEGER less than or equal to x.

so if x= 2, then [x]=2 , as 2 is the greatest integer less than or equal to 2.

but if x is 1.9, then [x] will be 1.

similary if x = .9, [x] = 0.

In both cases we get the value of x to be in the range 0 to 1.

so [x] for both is 0.
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Intern
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09 Oct 2009, 10:08
Great explanation. Thanks
Manager
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23 Oct 2009, 16:43
Yup, good explanation.
Re: OG12: DS_Algebra Inequality   [#permalink] 23 Oct 2009, 16:43
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