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Please help me understand this math question 2- 906) = xfOC) It is known that f'(x) 2. g(x) = xf(x) It is known that f'

Please help me understand this math question
2- 906) = xfOC) It is known that f'(x)

2. g(x) = xf(x) It is known that f' (x) < 0 for all real numbers x It is also known that f" (x) = 0 for all real numbers x Where is g(x) concave downwards? Justify your response.

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