26 Nov 2020 Question of the Day /Posted Bystephen/Comments0 Prove by induction that $1^3 + 2^3 + \cdots + k^3 = \left(1+2+\cdots+k\right)^2$. https://mathsgrinds.ie/wp-content/uploads/2020/11/2020-11-08_11-43-46.mp4