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If $|b| \geq 1$ and $x =\; – |a| b$, then which one of the following is necessarily true?

  1. $a – xb < 0$
  2. $a – xb \geq 0$
  3. $a – xb > 0$
  4. $a – xb \leq 0$
in Quantitative Aptitude edited by
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Answer B)

|b| >=1

means b>=1

and -b>=1

 

x= -|a|b

-b = +ve

x also +ve and >a

So,a-xb>=0
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