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# wat is the value of |x+y| a)|x|=3 b)|y|=2

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Senior Manager
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wat is the value of |x+y| a)|x|=3 b)|y|=2 [#permalink]

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22 Mar 2004, 20:01
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wat is the value of |x+y|

a)|x|=3
b)|y|=2
_________________

shubhangi

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22 Mar 2004, 20:07
recall the traingle inequality: |x+y| <= |x| + |y|

(1) and (2) each alone are not sufficient.
(1) and (2) gives the upper bound of |x+y|

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Senior Manager
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22 Mar 2004, 20:08
As we don't know the sign of x and y.

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22 Mar 2004, 20:08
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