वास्तविक गुणांकों वाले एक अशून्य बहुपद $f(x)$ में यह गुण है कि $f''(x) f'(x) = f(x)$ है। तो $f'''(x)$ का मान क्या है?

  • A
    $0$
  • B
    $-1$
  • C
    $f(x)$
  • D
    $f'(x)$

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