 Geometric–harmonic mean

The geometric-harmonic mean is a type of mean that combines features of both the geometric mean and the harmonic mean. Specifically, it is the mean of two numbers calculated through a two-step process involving these two types of means. 1. **Geometric Mean (GM)**: For two positive numbers \( a \) and \( b \), the geometric mean is given by: \[ GM = \sqrt{ab} \] 2.