S_n = \fracn2 (2a + (n - 1)d) - AMAZONAWS

Understanding the Formula for the nth Term of an Arithmetic Sequence: Sₙ = n/2 (2a + (n – 1)d)

📅 March 11, 2026 👤 scraface

Mar 11, 2026

$S_n = \frac{n}{2} (2a + (n - 1)d)$