Are Shankar's equations for example 1.8.6 wrong?

[juan123]

shankar "PQM" is wrong?

Shankar Principles of Quantum mechanics Pag 46: Example 1.8.6

The movement equations are in my opinion wrong.

Consider the following link for the same equations

http://farside.ph.utexas.edu/teaching/315/Waves/node17.html

 

[humanino]

What's the difference ? Comparing quicly, it appears less typos in Shankar as well as a more systematic treatment, but they seem to start and end with the same.