Calculate the energy of a `He^(+)ion` in its first excited state solution

Explanation

To calculate the energy of a \( \text{He}^+ \) ion in its first excited state, we can use the formula for the energy levels of hydrogen-like atoms:

\[ E_n = -\frac{R_H \cdot Z^2}{n^2} \]

Where:
- \( E_n \) is the energy of the electron in the nth energy level,
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