The set of values of 'a' for which the function \( f(x)=\frac{a x^{3}}{3}+(a+2) x^{2}+(a-1) x+2 ... VIDEO
The set of values of 'a' for which the function \( f(x)=\frac{a x^{3}}{3}+(a+2) x^{2}+(a-1) x+2 \) possess a negative point of inflection.
(a) \( (-\infty,-2) \cup(0, \infty) \)
(b) \( \{-4 / 5\} \)
(c) \( (-2,0) \)
(d) empty set
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