Find the point of inflection of the graph of the function. (If an answer does not...

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Find the point of inflection of the graph of the function. (If an answer does not exist, enter DNE.) (x, y) = f(x) - 6 sec(x-2), (0, 4x) Describe the concavity. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) concave upward concave downward Find the point of inflection of the graph of the function. (If an answer does not exist, enter DNE.) (x, y) = f(x) - 6 sec(x-2), (0, 4x) Describe the concavity. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) concave upward concave downward