State whether the function is a probability mass function or not. If not, explain why not. f= {(1,0.2),(2,0.1),(4,0.2),(6,0.5)}

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A: topic -series and its summation 

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A: topic - limits and continuity

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A: Given

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A: The given cost function,   Cq=q3-130q2+26000q

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A: Please refer to the image below

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A: Solved below