यदि $f(x)$ एक सम फलन (even function) है और $f^{\prime}(x)$ का अस्तित्व है,तो $f^{\prime}(e) + f^{\prime}(-e)$ का मान क्या है?

  • A
    $>0$
  • B
    $0$
  • C
    $\geq 0$
  • D
    $< 0$

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