Math Problem Statement

Katrine har laget et regneark for å finne antall kuler i de ulike pyramidetallene ved å først telle kuler i hvert lag, og så summere.

Hvilken formel skal stå i celle C4?

Svar: 

Solution

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Math Problem Analysis

Mathematical Concepts

Arithmetic Sequences
Summation

Formulas

Sum of an Arithmetic Sequence

Theorems

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Suitable Grade Level

Grades 7-9