સમીકરણ $\cos ^{-1} |x| + \cos ^{-1} |2x| = \pi$ માટે,વાસ્તવિક ઉકેલ(ઓ)ની સંખ્યા કેટલી છે?

  • A
    અનંત
  • B
    $2$
  • C
    $1$
  • D
    $0$

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