$\Delta \log f(x) + \Delta^{2}(3^{x})$ का मान क्या है?

  • A
    $\log \left[1 + \frac{\Delta f(x)}{f(x)}\right] + 4 \cdot 3^{x}$
  • B
    $\log \left[1 + \frac{\Delta f(x)}{f(x)}\right] + 3^{x}$
  • C
    $\log \left[\frac{\Delta f(x)}{1 + f(x)}\right] + 4 \cdot 3^{x}$
  • D
    $\log \left[\frac{\Delta f(x)}{1 + f(x)}\right] + 3^{x}$

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