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If f(x)=ex2(x2)(x3)(x4)dx

then f increases on

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a
(−∞,2)
b
(2, ∞)
c
(2, 3)
d
(3, ∞)

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detailed solution

Correct option is C

f′(x)=ex2(x−2)(x−3)(x−4)As ex2>0 for all x∈R,f′(x)>0if (x−2) (x−3) (x−4)>0 i.e., if 24Thus f(x) increases on the interval (2, 3)


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