BITSAT 2018 Slot 2 Solved Paper

Section: Mathematics

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Question : 137 of 150

Marks: +1, -0

For which interval the given function f(x)=−2x3−9x2−12x+1 is decreasing?

(−2,∞),
(−2,−1)
(−∞,−1)
(−∞,−2) or (−1,∞)

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