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Question

Let S be the set of real values of parameter λ for which the equation f(x) = 2x3 3(2+λ)x2 + 12λ x has exactly one local maximum and exactly one local minimum. Then S is a subset of


A
(-4, ∞)
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B
(-3, 3)
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C
(3, ∞)
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D
None of these
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