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The function f(x) =x^3+ax^2+bx+c,a^2lt=3...

The function `f(x) =x^3+ax^2+bx+c,a^2lt=3b` has

A

positive real numbers `in a^2le 3b`

B

real numbers `in a^2 le 3b`

C

negative real numbers `in a^2le 3b`

D

none

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-APPLICATIONS OF DIFFERENTIATION-EXERCISE 1E (MAXIMA AND MINIMA)
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  14. The function f(x) =x/2+2/x has a local minimum at

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