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Attempt following question by selecting a choice to answer.
B
Use Rolle's Theorem to determine the value of c such that f ′ (c) = 0, if f(x) = x2 - 16x + 63 in the interval [7, 9].c    B
A.  B8
B.  B0
C.  B9
D.  B7
E.  B18


B