Span Proof help plz! Hi, I'm working through a textbook on Linear Algebra and just need some info on some proofs. The text gives the Theorem but only provides proof on only one of the parts and I'm really curious as to how to prove b) and also c) so that I can understand the Theorem a bit better. It says the proofs are easy but I've just started learning on this topic so I'm not too clued up I've looked around on the internet and other books for proofs on this but can't find anything Can anyone give me a slight briefing on the proofs? Many many thanks!