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No work needed!! Just answers, thank you! 25 points!!
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No work needed!! Just answers, thank you! 25 points!!

No work needed!! Just answers, thank you! 25 points!!-example-1
No work needed!! Just answers, thank you! 25 points!!-example-1
No work needed!! Just answers, thank you! 25 points!!-example-2
User BaDr Amer
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1 Answer

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Answer:

Explanation:


S_(31) = 9 \cdot 31 + [-0.5 \cdot (31(31-1))/(2)] = 46.5


S_(40) = 40 + [-3 \cdot (40(40-1))/(2)] = -2300

User Kachna
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