Question

find the 9th tern of the geometric sequence 5,-25,125

Answer 1

Step-by-step explanation:

Given,

G.P: 5,25,125,...….

First term, a=5

Common ratio, r=

5

25

=5

∴ The 10

th

term =ar

9

[∵T

r

=ar

n−1

]

=5.(5)

9

=5

10

.