JEE Math Practice Question
If Rolle's theorem holds for the function $$f(x) = {x^3} - a{x^2} + bx - 4$$, $$x \in [1,2]$$ with $$f'\left( {{4 \over 3}} \right) = 0$$, then ordered pair (a, b) is equal to :
- A.($$-$$5, $$-$$8)
- B.(5, $$-$$8)
- C.($$-$$5, 8)
- D.(5, 8)
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