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For f(x) = x^2 - 4x + 3 on [1, 3], the point c given by Rolle's theorem is
A2
B1
C5/2
D3
Answer & Solution
Correct answer: A. 2
f(1) = f(3) = 0 and f'(c) = 2c - 4 = 0 gives c = 2.
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