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IrinaOK
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Absolute values, please explain 01 Sep 2007, 11:50
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Can you please, write answer with explanation



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sidbidus
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Absolute values, please explain 01 Sep 2007, 11:53
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Where are the following choices???


Anyways, is the ans 0<x<4??
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IrinaOK
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Absolute values, please explain 01 Sep 2007, 12:49
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sidbidus
Where are the following choices???


Anyways, is the ans 0<x<4??
Show more



sorry, I forgot about answer choices, I took from the challenge 24, can not access it now.

yes, the answer is 0<x<4.

can you explain please?
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sidbidus
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Absolute values, please explain Updated on: 01 Sep 2007, 13:04
Originally posted by sidbidus on 01 Sep 2007, 12:53.
Last edited by sidbidus on 01 Sep 2007, 13:04, edited 1 time in total.
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Try putting values..

If you put -2 , the equation is incorrect..........so decreasing the value.

At X> 0 the equation is satisfied.

So, 0<X

Now, till 4 the equation is satisfied......the moment the value becomes 4 or greater...the equation is incorrect.

So X<4

Combining,

0<x<4
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bkk145
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Absolute values, please explain 01 Sep 2007, 12:57
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IrinaOK
Can you please, write answer with explanation
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|2-x|<2
Case1:
2-x<0, x>2, you have
-2+x<2
x>4
So for case 1, 2<x<4

Case2:
2-x>0, x<2
2-x<2
x>0
So for case 2, 0<x<2

Together, 0<x<4
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IrinaOK
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Absolute values, please explain 01 Sep 2007, 14:42
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IrinaOK
Can you please, write answer with explanation
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|2-x|2, you have
-2+x4
So for case 1, 20, x0
So for case 2, 02
and for 2-x>0 to be correct x must be x<2

I got it now

HTML changed what I originally typed,

Anyway, I understood it



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