1
NDA Mathematics 10 April 2022
MCQ (Single Correct Answer)
+2.5
-0.83
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In which one of the following intervals is the function $f(x) = \frac{x^3}{3}-\frac{7x^2}{2} + 6x + 5$ decreasing?
A
(-∞, 1) only
B
(1, 6)
C
(6, ∞) only
D
(-∞, 1) ∪ (6, ∞)
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