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Calculus. Derivatives. Please show all your step, paper solution is preferred. Determine where the given function is concave up and where it is concave down.

Calculus. Derivatives. Please show all your step, paper solution is preferred.

Determine where the given function is concave up and where it is concave down. 5) f(x) = 2x3 - 9x2 + 12x

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