Let $S$ be the set of all functions $f:[0,1] \rightarrow \mathbb{R}$ which are continuous on $[0,1]$ and differentiable on $(0,1)$. Then for every $f \in S$,there exists a $c \in (0,1)$,depending on $f$,such that:

  • A
    $|f(c) - f(1)| < (1 - c)|f'(c)|$
  • B
    $|f(c) - f(1)| < |f'(c)|$
  • C
    $|f(c) + f(1)| < (1 + c)|f'(c)|$
  • D
    $\frac{f(1) - f(c)}{1 - c} = f'(a)$ for some $a \in (c, 1)$

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