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Question

The values of x for which x24a holds true, is
  1. [2a,)
  2. (,2a][2a,)
  3. (,a][a,)
  4. (,a)[a,)  


Solution

The correct option is B (,2a][2a,)
x24a|x|2ax2a  or  x2ax(,2a][2a,)

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