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Evaluate k=120(k3+4)\sum _ { k = 1 } ^ { 20 } \left( k ^ { 3 } + 4 \right)

question 80

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Evaluate k=120(k3+4) \sum _ { k = 1 } ^ { 20 } \left( k ^ { 3 } + 4 \right) using the summation formulas and properties.


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