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Let c be a constant. The function f (x) = 2 +5x + (6 -5x) Inr + c is concave up on the following interval(s):

Let c be a constant. The function f (x) = 2 +5x + (6 -5x) Inr + c is concave up on the following interval(s): O (3, 8) O (0, 6) O (6,00) Of is never concave up O (0, 3) and (6, 00)

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