दिया गया है कि $\frac{d}{dx}f(x) = f'(x)$। संबंध $f'(a + b) = f'(a) + f'(b)$ मान्य है यदि $f(x)$ बराबर है

  • A
    $x$
  • B
    $x^2$
  • C
    $x^3$
  • D
    $x^4$

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