Question: 39. Let f be a function with second derivative given by / (x) = sin (2x) - cos (4x). How many points of inflection does

39. Let f be a function with second derivative given by

39. Let f be a function with second derivative given by / (x) = sin (2x) - cos (4x). How many points of inflection does the graph of f have on the interval [0, 10]? (A) Six (B) Seven (C) Eight (D) Ten E) Thirteen

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