Arithmetic Sum

IB Maths Studies / Applications: Arithmetic Sum

"Use cubes to do a lovely proof of the sum of an arithmetic sequence!"You need to know how to use and apply the formula for the sum of an arithmetic sequence but here you can go one better by understanding where it comes from and proving it by yourselves! Proof is the holy grail of mathematics and not always easy to get at but here is a real opportunity to understand the idea and then show off in ToK class! This is a...

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