Inequality Condition for Real Numbers

CAT 2000 Slot 1 · QA · Easy · Algebra

If x>2x > 2 and y>1y > -1, then which of the following statements is necessarily true?

  1. A.

    xy>2xy > -2

  2. B.

    x<2y-x < 2y

  3. C.

    xy<2xy < -2

  4. D.

    x>2y-x > 2y

Answer

B

Explanation

Given x>2    x<2x > 2 \implies -x < -2. Also y>1    2y>2y > -1 \implies 2y > -2. Comparing x<2-x < -2 and 2y>22y > -2, we get x<2y-x < 2y.

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