$2{x^3} - 6x + 5$ एक वर्धमान फलन है यदि

  • A
    $0 < x < 1$
  • B
    $-1 < x < 1$
  • C
    $x < -1$ या $x > 1$
  • D
    $-1 < x < -1/2$

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