Let $f(x) = 8x^3 - 6x^2 - 2x + 1,$ then

  • A

    $f(x) = 0$ has no root in $(0,1)$

  • B

    $f(x) = 0$ has at least one root in $(0,1)$

  • C

    $f' (c)$ vanishes for some $c\, \in \,(0,1)$

  • D

    Both $(B)$ and $(C)$

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