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Is xy + z = z, is |x-y| > 0 ? (1) x 0 (2) y = 0

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Is xy + z = z, is |x-y| > 0 ? (1) x 0 (2) y = 0 [#permalink] New post 03 Jan 2010, 09:49
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Is xy + z = z, is |x-y| > 0 ?
(1) x ≠ 0
(2) y = 0
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Re: Modulus+Inequality:paper tests [#permalink] New post 03 Jan 2010, 09:56
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A...
from eq xy+z=z , we know xy is 0...
for lx-yl>0 x-y ≠ 0...
si) x ≠ 0 so y=0 and x-y will be a -ive or +ive no... suff
sii) y=0... x can be 0 or any other no ...not suff
Re: Modulus+Inequality:paper tests   [#permalink] 03 Jan 2010, 09:56
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Is xy + z = z, is |x-y| > 0 ? (1) x 0 (2) y = 0

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