Math Problem Statement

Suku ketiga dan suku keenam barisan aritmetika berturut-turut -2 dan -7. Nilai suku ke-20 adalah

Solution

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Math Problem Analysis

Mathematical Concepts

Arithmetic Sequence
Linear Equations
Algebra

Formulas

U_n = a + (n-1) * b

Theorems

Arithmetic Sequence Formula

Suitable Grade Level

Grades 9-11