$x^{-4}(3-4x^{-5})$ का अवकलज ज्ञात कीजिए।

  • A
    $-12x^{-5} + 36x^{-10}$
  • B
    $12x^{-5} - 36x^{-10}$
  • C
    $-12x^{-5} - 36x^{-10}$
  • D
    $12x^{-5} + 36x^{-10}$

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