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If f(x)=x^(3)+bx^(2)+cx+d and 0 lt b^(2)...

If `f(x)=x^(3)+bx^(2)+cx+d and 0 lt b^(2) lt c`, then in `(-oo, oo), f(x)` :

A

is increasing

B

has real maximum

C

is decreasing

D

is bounded.

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Verified by Experts

The correct Answer is:
A
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