This question is from the book Abstract Algebra: Theory and Applications by Thomas W. Judson.
Chapter 2 – Question 2
Prove that
$$1^3 + 2^3 + \cdots + n^3 = \left( \frac{n(n + 1)}{2} \right)^2$$ for $n \in \mathbb{N}$.
This question is from the book Abstract Algebra: Theory and Applications by Thomas W. Judson.
Prove that
$$1^3 + 2^3 + \cdots + n^3 = \left( \frac{n(n + 1)}{2} \right)^2$$ for $n \in \mathbb{N}$.