The geometric mean is similar to the arithmetic mean (or average). The geometric mean of n terms is equal to the nth root of the n terms or :
So x can be equal to 2 or 2/11. We check if these are extraneous roots (meaning they do not work).
When x = 2,This is true therefore x can be 2.
When x = 2/11This is not true therefore x cannot be 2/11.
The only possible value of x is then 2.