8. What is the value of the first term in a geometric sequence, if the given terms are as= 54 and a3 = 486
a. 2,347
b. 3,458
c. 4,025
d. 4,374

9. In the geometric sequence the values of 5th term is 48 and the 7th terms 192 respectively? what is the value of the 9th term in the sequence ?
a. 768
b. 820
c. 854
d. 960

10. Which of the following are the three geometric means of the sequence between 14 and 224?
a. 26,52, 104
b. 24, 48,96
C. 25, 50,75
d. 28,56 112​