Q. 175.0( 1 Vote )
Let I be an inter
We can see f’(x) <0 in [-1,1]
i.e. f(x) is decreasing in this interval.
We can see f’(x) >0 in (-∞, -1) ∪(1, ∞)
i.e. f(x) is increasing in this interval.
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