यदि $\int\limits_0^x {f\left( t \right)} dt = {x^2} + \int\limits_x^1 {{t^2}f\left( t \right)dt} $ है,तो $f'(1/2)$ का मान ज्ञात कीजिए।

  • A
    $\frac{24}{25}$
  • B
    $\frac{18}{25}$
  • C
    $\frac{4}{5}$
  • D
    $\frac{6}{25}$

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