If from the Mean Value Theorem,$f'({x_1}) = \frac{f(b) - f(a)}{b - a}$,then

  • A
    $a < {x_1} \le b$
  • B
    $a \le {x_1} < b$
  • C
    $a < {x_1} < b$
  • D
    $a \le {x_1} \le b$

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