In Problems 20-25, use the sum formulas I-V to express each of the following without the summation symbol. In Problems 20-23, find the numerical value.
Intermediate Algebra
Single Variable Calculus: Early Transcendentals, Volume I
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Essentials Of Statistics
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Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach
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Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th
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Research Methods for the Behavioral Sciences (MindTap Course List)
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Essentials Of Statistics For Business & Economics
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Calculus Volume 1