Question

When finding the 9th term in a geometric sequence with a common ratio of 2 and a first

Answer 1

Answer:

8

Step-by-step explanation:

Nth term of a geometric sequence is given as:

$t_n = a r^{(n-1)}$ ...(1)

Plugging n = 9, a = 3 and r = 2 in the above equation, we find:

$t_9 = (3) (2)^{9-1}$

$t_9 = (3) (2)^{8}$... (2)

Comparing equations (1) & (2), we obtan:

(n - 1) = 8