Use the Numerov method to find the lowest three stationary-state energies for a particle in a one-dimensional box of length l with walls of infinite height.
use either a program similar to that in Table 4.1, a spreadsheet, or a computer-algebra system such as Mathcad. If negative eigenvalues are being sought using Excel 2010, you must uncheck the Make Unconstrained Variables Non-Negative box in the Solver Parameters box.