मान लीजिए $g(x) = \log(f(x))$ जहाँ $f(x)$,$(0, \infty)$ पर एक दो बार अवकलनीय धनात्मक फलन है,इस प्रकार कि $f(x+1) = x f(x)$ है। तो,$N = 1, 2, 3, \ldots$ के लिए,$g^{\prime \prime}\left(N+\frac{1}{2}\right) - g^{\prime \prime}\left(\frac{1}{2}\right) = $

  • A
    $-4\left\{1+\frac{1}{9}+\frac{1}{25}+\ldots+\frac{1}{(2N-1)^2}\right\}$
  • B
    $4\left\{1+\frac{1}{9}+\frac{1}{25}+\ldots+\frac{1}{(2N-1)^2}\right\}$
  • C
    $-4\left\{1+\frac{1}{9}+\frac{1}{25}+\ldots+\frac{1}{(2N+1)^2}\right\}$
  • D
    $4\left\{1+\frac{1}{9}+\frac{1}{25}+\ldots+\frac{1}{(2N+1)^2}\right\}$

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