Math Problem Statement
74 misol
74. (a11-g13-27) 1·3 + 5·8 + 9·13 + S20 = ?
Solution
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Math Problem Analysis
Mathematical Concepts
Arithmetic Series
Summation
Formulas
Sum of arithmetic series: S_n = (n/2) * (a_1 + a_n)
Theorems
Arithmetic Progression Theorem
Suitable Grade Level
Grades 10-12
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