\( 120 = 3n(n+1) → n(n+1) = 40 → n ≈ 6.3 → n=6: 6×7=42>40, n=5:5×6=30<40 — no. - AMAZONAWS

📅 March 11, 2026 👤 scraface

Mar 11, 2026

$\( 120 = 3n(n+1) → n(n+1) = 40 → n ≈ 6.3 → n=6: 6×7=42>40, n=5:5×6=30<40 — no.$