1. The problem statement, all variables and given/known data Using time independent 1D Shrodinger equation, show that if V(x) is even and Psi(x) is a solution, Psi(-x) is also solution. Then, assume Psi(-x) and Psi(x) differ only by a constant, show that the constant is either +1 or -1. 2. Relevant equations 3. The attempt at a solution Can I get some help just on where to start the first part for now? I tried solving the time independent shrodinger equation for V(x) and setting V(x) = V(-x) which gave me: Psi(x)/Psi(-x) = Psi''(-x)/Psi''(x) but I can't figure out where to go from here or even if i'm doing the right thing.