If b^(2) lt 2ac, the equation ax^(3)+bx^...

If `b^(2) lt 2ac`, the equation `ax^(3)+bx^(2)+cx+d=0` has (where a, b, c, d in R and `a gt 0`)

A

one real and two imaginary roots

B

all the roots real and distinct

C

all the roots real and equal

D

all the roots real and two of them equal different from the third

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The correct Answer is:

A

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