1. The problem statement, all variables and given/known data If <∅| is normalized, show that: <∅|∅>=1=<∅|n><n|∅> (where ∅ is a non-eigenfunction wave function composed of Ʃc(n)ψ(n). 2. Relevant equations 3. The attempt at a solution I can show that <∅|∅>=Ʃc*(n)c(n) (=1). But the next part of the question asks to use your proof to show Ʃc*(n)c(n)=1 so that's not the way it is supposed to be done. I feel like I'm missing something very simple.