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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

f(x) is strictly increasing function

B

f(x) has a local maxima

C

f(x) is strictly decreasing function

D

f(x) is bounded

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A
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