The GM between -9 and -16, is

The geometric mean between -9 and -16 is

The G.M. between -2i and 8i is:

The mean proportional between 9 and 16 is

The product of 10 G.M's between 1 and 49 is

Insert three geometric mean (GM) between 1 and 1/16 .

If (a-1) is the G.M between (a-2) and (a+1) then a =

a,b,c are in A.P., x is G.M between a and b, y is the G.M between b and c then b^2 is

Inserting three G.M.'s between 1/9 and 9 verify that their product is equal to cube of G.M. of 1/9 and 9.