The above image is from my class notes. I am not able to understand the concept of GMD and GMR calculation.
While practicing, I came across the below problem
Now I am not able to understand how the above formulae can be used to solve this problem. Please help me with this concept.
EDIT 1: I was expecting the solution to be like
Taking 1 as a phase and 2,3 as another phase
Mutual GMD = (D12 x D13)^(1/2) = (2 x 4)^(1/2) = 2.828