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On what interval does x² − 6x + 1 fall as x grows?
A(−∞, 3)
B(3, ∞)
C(0, 6)
D(−∞, 6)
Answer & Solution
Correct answer: A. (−∞, 3)
f'(x) = 2x − 6 is negative exactly when x < 3.
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