a_3 = a_2 + a_1 = 3 + 2 = 5 \\

Tue, 05 May 2026 03:39:09 +0000

The Simple Sum of 3, 2, and 1: How 3 + 2 + 1 Equals 5 – A Foundational Math Explained Mathematics might seem like a distant subject, but its basic principles are woven into everyday life. One of the most fundamental concepts is addition—the building block of arithmetic. Consider the equation a₃ = a₂ + a₁ = 3 + 2 = 5. While it looks simple, this equation captures the essence of how we combine values to arrive at a total. ### What Does a₃ = a₂ + a₁ Mean? In this expression, a₁, a₂, and a₃ represent specific values in a sequence of addition. Here: