I am studying Real analysis , and there is a question that I am not sure if I should ask it under Number Theory section but I will ask it anyway
Does anyone know how to prove this?
an - bn = (a-b) (an-1 + an-2b +....... + abn-2 + bn-1)
Does anyone know how to prove this or know at least to which category does this kind of question goes to so I can ask to the right place? Thank you.