JEE Mains Model Paper 6

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Question : 27 of 90

Marks: +1, -0

Let f (x) =

a2−4

a2+2

‌x3 - 3x + sin3. Then for f(x) to be a decreasing function in R, possible values ofa are given by

(−∞, −2)
[2, ∞)
[−2, 2]
(−∞, −1]

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