StevenXClontz’s Twitter Archive—№ 8,682

The derivative of ∑_{n=0}^∞ a_nx^n should be taught as ∑_{n=0}^∞ d/dx[a_nx^n], not ∑_{n=1}^∞ na_nx^{n-1} or ∑_{n=0}^∞ (n+1)a_nx^n. Keep it simple, sillies. 😘🙃