1.

Let f(x) = ax^(3)+ bx^(2) + cx + d, b^(2) - 3ac gt 0, a gt 0, c lt 0. Then f(x) has

Answer»

local MAXIMUM at some `x in R^(+)`
a local maximum at some `x in R^(-)`
a local minima at x=0
local minima at some `x in R^(-)` ltbr. `R^(+) = (0, oo), R^(-) = (-oo, 0)`

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