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Find the largest open intervals where the function is concave upward. f(x) = 4x 3 -45x 2 =150x A. (-15/4, ~) B. (15/4, ~) C.

Find the largest open intervals where the function is concave upward.

f(x) = 4x³-45x²=150x

A. (-15/4, ~)

B. (15/4, ~)

C. (-~, 15/4)

D. (-~,-15/4)

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