1. The problem statement, all variables and given/known data Referencing image attached. I'm not sure how the example arrived at ψ ⇒ 0 at x<0 and >L as K ⇒ ∞ in the limiting case of an infinite potential well. 2. Relevant equations 3. The attempt at a solution I tried simply applying limits to the wavefuction but in the case x<0, the answer I was arriving at was simply ∞ as the term with constant C approaches 0 and the term with constant D approaches ∞. I'm also clueless as how ψ ⇒ 0 for x>L. Can anyone help point out what I'm missing? Thanks in advance.