If b^2-4ac=0,a>0 then the domain of the ...

If `b^2-4ac=0,a>0` then the domain of the function `f(x)=log(a x^3+(a+b)x^2+(b+c)x+c)` is :

A

`R-{-(b)/(2a)}`

B

`R-{(-b/(2a))} cup {x |x ge -1}}`

C

`R-{-(b)/(2a)} cap (-1,oo)`

D

None of these

Verified by Experts

The correct Answer is:

C

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