ધારો કે વિકલનીય વિધેય $f:(0, \infty) \rightarrow \mathbb{R}$ માટે,$f(x)-f(y) \geq \log_e\left(\frac{x}{y}\right)+x-y, \forall x, y \in(0, \infty)$ છે. તો $\sum_{n=1}^{20} f^{\prime}\left(\frac{1}{n^2}\right)$ ની કિંમત શોધો.

  • A
    $8569$
  • B
    $2890$
  • C
    $1256$
  • D
    $3564$

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