Question: Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation. 1 2 3 20

Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation. 1 2 3 20 3 4 20 + 1 2 3 20 2 3 ... + 20 + 1 Enter your answer in each of the answer boxes.
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