यदि $x({x^4} + 1)\phi (x) = 1,$ है,तो $\int_1^2 {\phi (x)\,dx = } $

  • A
    $\frac{1}{4}\log \frac{{32}}{{17}}$
  • B
    $\frac{1}{2}\log \frac{{32}}{{17}}$
  • C
    $\frac{1}{4}\log \frac{{16}}{{17}}$
  • D
    इनमें से कोई नहीं

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