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What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11

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What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11 [#permalink] New post 22 Nov 2006, 12:29
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What is the value of y?

(1) 3|x^2 – 4| = y – 2

(2) |3 – y| = 11










Ans : C
Senior Manager
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 [#permalink] New post 22 Nov 2006, 16:56
c.

st2 limits y to one positive and one ngative possible values for y.
st1 tells you nothing about the exact value of y (it depends on x). but it implies y is positive.

both together tells you exactly what is the value fo y.
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 [#permalink] New post 22 Nov 2006, 17:46
C 2.

y can be -8 or 14 from 2. but using 1, u can eliminate -8.
  [#permalink] 22 Nov 2006, 17:46
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What is the value of y? (1) 3|x^2 4| = y 2 (2) |3 y| = 11

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