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If the function f(x) = ax^3 + b x^2+11x ...

If the function `f(x) = ax^3 + b x^2+11x - 6` satisfies conditions
of Rolle's theorem in [1, 3] and `f’(2+ (frac{1}{sqrt 3}))`= 0,
then values of a and b are respectively

A

1,-6

B

-2,1

C

-1,-6

D

-1,6

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