(Solved):
Use a CAS to approximate the first four eigenvalues \( \lambda_{1}, \lambda_{ ...
???????
Use a CAS to approximate the first four eigenvalues \( \lambda_{1}, \lambda_{2}, \lambda_{3} \), and \( \lambda_{4} \). \[ y^{\prime \prime}+\lambda y=0, \quad y(0)=0, \quad y(1)-\frac{1}{2} y^{\prime}(1)=0 \]