Math Problem Statement
Solution
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Math Problem Analysis
Mathematical Concepts
Summation series
Arithmetic progressions
Closed form
Formulas
1·2 + 2·3 + ... + n·(n+1) = n(n+1)(n+2)/3
1·4 + 2·7 + ... + n·(3n+1) = n(n+1)^2
Theorems
Summation formulas for series involving consecutive integers
Suitable Grade Level
High School (Grades 10-12)
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