Maxima and MinimaHard

Question

The set of value (s) of ′a′ for which the function
f(x) = + ( a + 2)x2 + (a - 1) x + 2 possess a negative point inflection-

Options

A.(-∞, -2) υ (0, ∞)
B.{-4/5}
C.(-2, 0)
D.empty set

Solution

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