The correct options are
A 6
B 18
C 54
If n geometric means are inserted between a and b, then the common ratio r is
r=(ba)1n+1Here a = 2, b = 486, and n = 4∴r=(4862)14+1=(343)1/5=(35)1/5=3.
Hence, the four geometric means between 2 and 486 are 6, 18, 54, 162.